Calculators A-Z

Estimate 401(k) retirement savings from salary, contributions, employer match, and growth.

Estimate employer 401k match value from salary, contribution rate, and match rules.

Estimate future college savings from current balance, monthly contributions, and annual return.

Calculate absenteeism rate from lost workdays and scheduled workdays.

Calculate the absolute value of a number.

Calculate acceleration from velocity change and time.

Calculate days payable outstanding from accounts payable and cost of goods sold.

Calculate accounts payable turnover from supplier purchases and average accounts payable.

Calculate days sales outstanding from accounts receivable and credit sales.

Calculate accounts receivable turnover from net credit sales and average receivables.

Convert acres to square feet.

Convert acres to square meters.

Add business days to a start date while skipping weekends.

Estimate an adjustable-rate mortgage payment before and after the rate adjustment period.

Calculate investment return after taxes.

Calculate exact age from date of birth.

Calculate the difference between two birth dates.

Convert oven temperature and time to an air fryer estimate.

Estimate monthly payment, total interest, and payoff schedule summary for an amortized loan.

Convert amps to watts at selected volts.

Convert RPM to angular velocity in radians per second.

Convert hourly, daily, weekly, or monthly income into annual income.

Calculate APY from nominal interest rate and compounding frequency.

Estimate the future value of equal periodic contributions.

Calculate the area of a ring shape from outer and inner radius.

Estimate daily, monthly, and yearly appliance electricity cost.

Estimate the cash gap when a home appraises below the purchase price.

Estimate APR from finance charge, loan amount, and loan term.

Convert annual percentage rate into an approximate monthly interest rate.

Calculate aquarium or fish tank volume in gallons and liters.

Calculate rectangle area from length and width.

Calculate terms and sums for an arithmetic sequence.

Estimate body fat using neck, waist, height, and sex inputs.

Calculate average revenue per user.

Calculate annual recurring revenue from monthly recurring revenue.

Scale width or height while preserving aspect ratio.

Estimate asphalt volume and weight for a driveway or surface.

Estimate asphalt tons from area, thickness, and density.

Convert portfolio allocation percentages into dollar amounts by asset class.

Convert atmospheres to pounds per square inch.

Estimate required attic ventilation net free area from attic floor area.

Estimate monthly car loan payments from vehicle price, down payment, trade-in, rate, and term.

Calculate the average of comma-separated numbers.

Calculate average order value from revenue and number of orders.

Calculate ARPA from recurring revenue and accounts.

Calculate average speed from distance and time.

Calculate baby age in days, weeks, and months from birth date.

Estimate debt-to-income ratio from housing, other debts, and gross monthly income.

Calculate baker percentages for flour, water, salt, and yeast.

Convert between instant yeast, active dry yeast, and fresh yeast.

Compare baking pan areas and calculate recipe scaling factor.

Estimate savings from moving credit card debt to a balance transfer offer.

Estimate the remaining balloon balance after a period of payments.

Estimate data transfer time from file size and bandwidth.

Convert a number between bases from 2 to 36.

Estimate baseboard trim length from room perimeter, openings, and waste.

Scale a batch recipe by desired total portions.

Estimate billable revenue from hourly rate, billable hours, and non-billable time.

Add, subtract, multiply, or divide binary numbers and show decimal equivalents.

Calculate days until next birthday and approximate age.

Compare monthly mortgage payments with a biweekly payment strategy.

Estimate biweekly pay from annual salary or hourly work.

Estimate inside-mount or outside-mount blind size from window dimensions.

Calculate body mass index from height and weight.

Calculate BMI using pounds and inches.

Calculate BMI Prime relative to the upper normal BMI limit.

Estimate basal metabolic rate using weight, height, age, and sex.

Calculate board feet from lumber dimensions.

Estimate body adiposity index from hip circumference and height.

Estimate body fat percentage using a simple BMI-based method.

Estimate body fat percentage using the U.S. Navy-style circumference method.

Estimate body frame size from wrist circumference and height.

Estimate body roundness index from waist circumference and height.

Estimate body surface area from height and weight.

Estimate total body water from body weight and body water percentage.

Estimate a bond price from face value, coupon rate, market yield, and years to maturity.

Estimate current yield and approximate yield to maturity for a bond.

Calculate bounce rate from bounced visits and total visits.

Calculate bread or sourdough hydration percentage.

Calculate the rent needed to cover mortgage, expenses, and vacancy allowance.

Calculate revenue needed to break even from fixed costs and contribution margin ratio.

Calculate ROAS needed to break even from gross margin.

Calculate the sales revenue needed to break even from fixed costs and gross margin.

Estimate the stock sell price needed to break even after trading fees.

Calculate how many units you need to sell to break even.

Estimate number of bricks needed for a wall.

Estimate temporary bridge loan interest, fees, and total short-term borrowing cost.

Calculate salt needed for a brine by water volume and salt percentage.

Estimate room cooling BTU from square footage and climate factor.

Convert British thermal units to kilowatt-hours.

Split monthly income into needs, wants, savings, and remaining money.

Estimate startup burn multiple from net burn and net new ARR.

Calculate monthly cash burn.

Count weekdays between two dates, excluding Saturdays and Sundays.

Estimate business loan payment, total repayment, and total interest.

Convert butter between tablespoons, grams, ounces, cups, and sticks.

Convert butter grams to tablespoons.

Estimate buyer closing costs from purchase price and closing cost percentage.

Estimate total caffeine intake from drinks or servings.

Calculate compound annual growth rate from beginning value, ending value, and years.

Estimate cake batter volume needed for round or rectangular pans.

Scale a cake recipe between round or rectangular pan sizes by area.

Estimate cake servings from cake area and serving size.

Estimate daily calories using the Mifflin-St Jeor equation.

Estimate weekly weight loss from a daily calorie deficit.

Convert calories to macro grams using protein, carb, fat, or alcohol factors.

Estimate calories burned using MET, body weight, and duration.

Split daily calories across meals and snacks.

Convert calories to joules, including food kilocalories.

Calculate real estate capitalization rate from NOI and property value.

Calculate capacitor charge and stored energy.

Estimate monthly capital expense reserve for a rental property.

Estimate capital gain and tax owed using purchase price, sale price, quantity, and tax rate.

Estimate affordable car price from monthly budget, down payment, rate, and term.

Estimate daily carbohydrate grams from calories and carb percentage.

Estimate carpet area and cost with waste.

Calculate cart abandonment rate from carts created and completed purchases.

Calculate cash conversion cycle from inventory, receivable, and payable days.

Calculate cash-on-cash return for a rental or real estate investment.

Estimate how many months business cash will last at the current burn rate.

Estimate available cash from a cash-out refinance after payoff, LTV, and closing costs.

Calculate cashback rewards from spending and reward rate.

Estimate total servings needed for an event with buffer percentage.

Estimate caulk tubes needed from joint length and bead size.

Calculate cubic meters from package or room dimensions in meters.

Estimate a simple certificate of deposit ladder with staggered maturities.

Estimate ceiling fan diameter from room area.

Convert centimeters to feet.

Convert cubic feet per minute to cubic meters per hour.

Calculate chargeback rate from chargebacks and total transactions.

Estimate chicken cooking time from weight and minutes per pound.

Convert chocolate cups to grams using a practical kitchen estimate.

Calculate chronological age from birth date to a target date.

Calculate customer churn rate for a period.

Calculate the area and circumference of a circle from radius.

Calculate circle area and circumference from radius.

Calculate the average score for a class or group.

Estimate home purchase closing costs as a percent of price.

Convert cocoa powder cups to grams for baking.

Estimate coffee brew strength from coffee dose and final beverage weight.

Calculate coffee or water amount from a brew ratio.

Calculate coffee and water amounts from a brew ratio.

Calculate coffee and water amounts for cold brew concentrate or ready-to-drink brew.

Calculate combinations nCr.

Calculate CLTV from first mortgage, second mortgage, and property value.

Estimate monthly and annual commercial rent from square feet and rent per square foot.

Calculate commission earnings from sales and commission rate.

Add, subtract, multiply, or divide two complex numbers.

Estimate compost volume for a garden bed or lawn top dressing.

Calculate compound interest growth with regular compounding.

Calculate mass concentration from solute mass and solution volume.

Estimate bags of concrete needed from project volume and bag yield.

Estimate concrete volume for a slab.

Estimate concrete volume for a round column.

Estimate concrete project cost from volume and price per cubic yard.

Estimate concrete needed for continuous footings or footers.

Estimate concrete volume for a rectangular slab.

Estimate concrete slab volume and material cost.

Calculate cone volume from radius and height.

Estimate a confidence interval for a mean from sample mean, standard deviation, sample size, and z-score.

Calculate contribution margin per unit and contribution margin ratio.

Calculate conversion rate from visitors and conversions.

Estimate total conversion value from conversions and average value per conversion.

Calculate cookies per person and total servings for a batch.

Convert common cooking volumes between cups, tablespoons, teaspoons, and milliliters.

Adjust cooking time when temperature changes.

Estimate cooking time from food weight and minutes per pound.

Estimate VO2 max from distance covered in 12 minutes.

Estimate albumin-corrected calcium using a common clinical formula.

Compare salary needs between two cost-of-living levels.

Calculate acquisition cost from spend and acquired customers.

Calculate marketing cost per lead.

Calculate days remaining until a future date.

Calculate advertising cost per click.

Calculate advertising cost per thousand impressions.

Estimate monthly credit card interest from balance and APR.

Estimate months to pay off a credit card balance with fixed monthly payments.

Calculate credit utilization from balance and credit limit.

Estimate crown molding length from ceiling perimeter and waste.

Calculate click-through rate from clicks and impressions.

Calculate the cube root of a number.

Calculate cubic feet from length, width, and height in feet.

Convert cubic feet to cubic yards.

Convert cubic feet to us gallons.

Convert cubic feet to liters.

Calculate cubic inches from length, width, and height in inches.

Calculate cubic yards from length, width, and depth in feet.

Estimate tons from cubic yards and material density.

Convert cups to grams using ingredient density.

Convert US cups to milliliters.

Convert cups to tablespoons.

Calculate current ratio from current assets and current liabilities.

Estimate curtain panel width from window width and fullness.

Calculate CAC from marketing spend and new customers.

Estimate CAC payback period in months from CAC and monthly gross profit.

Estimate monthly revenue lost from customer churn.

Estimate customer lifetime value from average order value, purchase frequency, margin, and lifespan.

Calculate average cycling speed from ride distance and time.

Calculate cylinder volume and surface area from radius and height.

Calculate compound interest with daily compounding.

Estimate daily water intake from body weight and activity time.

Calculate data transferred from speed and time.

Add or subtract days from a date.

Count days between two dates.

Find the date a number of days from today.

Calculate how many days have passed since a selected date.

Calculate how many days remain until a date.

Compare current debt payments with a consolidated loan payment.

Estimate time to pay off a debt using fixed monthly payments.

Calculate DSCR from net operating income and annual debt service.

Calculate debt-to-equity ratio from total liabilities and shareholder equity.

Calculate debt yield for a commercial real estate loan from NOI and loan amount.

Calculate debt-to-income ratio from monthly debt payments and monthly income.

Convert decimal hours into hours and minutes for payroll or time tracking.

Convert a decimal to an approximate fraction.

Convert a decimal into a simplified mixed number.

Convert a decimal into a percentage.

Estimate deck board count from deck width, board width, and gap.

Estimate deck stain needed from deck area, coats, and coverage.

Estimate decking boards needed from deck size and board coverage.

Calculate density, mass, or volume relationship.

Convert density between kg/m³, g/mL, lb/ft³, and lb/gal.

Estimate straight-line annual depreciation.

Calculate a 2×2 or 3×3 matrix determinant.

Calculate final concentration after dilution.

Calculate dimensional shipping weight from package dimensions and divisor.

Calculate sale price and money saved after a discount.

Estimate present value from future cash flows and a discount rate.

Calculate distance between two coordinate points.

Calculate the distance between two coordinate points.

Calculate dividend payout ratio from dividends and earnings.

Estimate investment growth when dividends are reinvested.

Calculate dividend yield from annual dividend and share price.

Calculate average cost per share from repeated investments.

Calculate door surface area for painting or finishing.

Calculate dough ball weight for pizza or bread portions.

Calculate down payment amount and remaining loan amount.

Calculate monthly savings needed to reach a down payment goal.

Estimate download time from file size and internet speed.

Estimate driveway sealer needed from area and coverage.

Estimate drywall sheets needed from wall area and sheet size.

Estimate due date from conception date.

Calculate days remaining until a due date.

Calculate EBITDA margin from EBITDA and revenue.

Calculate the ROAS needed to break even after gross margin and variable costs.

Convert a nominal interest rate and compounding frequency into an effective annual rate.

Convert nominal interest rate into an effective annual rate.

Convert between egg sizes by approximate weight.

Estimate electricity cost from watts, hours, and price per kWh.

Calculate email click rate from clicks and delivered emails.

Calculate email conversion rate from conversions and delivered emails.

Calculate email campaign open rate.

Estimate how much to save for an emergency fund.

Calculate how many months your emergency fund can cover expenses.

Calculate employee turnover rate for a period.

Generate equivalent fractions for a given fraction.

Estimate monthly escrow for property tax, homeowners insurance, and HOA fees.

Estimate monthly escrow increase needed to repay a shortage.

Calculate espresso yield from dose and brew ratio.

Estimate electric vehicle charging cost from battery size, charge percentage, and electricity rate.

Calculate the score needed on a final exam to reach a target grade.

Calculate expected value from outcomes and probabilities.

Estimate fund or ETF fees from balance, expense ratio, and time.

Calculate a number raised to a power.

Calculate exponential growth over time.

Estimate how extra monthly payments can reduce mortgage payoff time.

Calculate n factorial for non-negative integers.

Estimate daily fat grams from calories and fat percentage.

Convert feet per second to miles per hour.

Convert feet to inches.

Convert feet to meters.

Estimate fence panels and posts from total fence length.

Estimate fence cost from length, price per foot, gates, and labor.

Estimate gate opening width and gate material from number of gates.

Estimate paint or stain needed for a fence.

Calculate approximate fence post count from fence length and post spacing.

Calculate salt needed for vegetable fermentation by weight percentage.

Estimate fertilizer needed from area and application rate.

Estimate daily fiber target from calories or a direct grams-per-day goal.

Calculate the final exam score needed to reach a target course grade.

Estimate years to financial independence from net worth, savings, spending, and return.

Estimate the financial independence number from yearly spending and withdrawal rate.

Estimate flooring material needed including waste.

Convert flow rate between GPM, LPM, CFM, and m³/h.

Calculate food cost per portion from total recipe cost and portions.

Calculate restaurant food cost percentage from food cost and food sales.

Calculate force from mass and acceleration.

Estimate account growth from recurring percentage gains.

Add, subtract, multiply, or divide two fractions.

Convert a fraction into decimal and percent form.

Convert a fraction into a percentage.

Estimate an hourly freelance rate from income goals and billable hours.

Convert frequency between Hz, kHz, MHz, RPM, and period seconds.

Estimate housing expense ratio from monthly housing payment and gross monthly income.

Estimate trip fuel cost from distance, efficiency, and fuel price.

Calculate miles per gallon or kilometers per liter from distance and fuel used.

Estimate future value from present value, rate, and time.

Convert US gallons per minute to liters per minute.

Convert US gallons to cubic feet.

Convert us gallons to us fluid ounces.

Estimate pounds from US gallons and pounds per gallon.

Estimate epoxy coating needed for a garage floor.

Estimate soil needed to fill a raised garden bed.

Estimate fuel cost per mile from fuel price and vehicle MPG.

Calculate greatest common divisor of two numbers.

Estimate generation label from birth year.

Calculate the geometric mean of positive numbers.

Calculate terms and sums for a geometric sequence.

Calculate GPA from total grade points and credits.

Convert GPA to an approximate percentage using a simple scale.

Calculate weighted grade from score and weight.

Convert macro grams to calories using protein, carb, fat, or alcohol factors.

Convert grams to cups using grams per cup.

Convert grams to milliliters using ingredient density.

Convert grams to ounces.

Convert grams to pounds.

Convert grams to tablespoons using grams per tablespoon.

Convert grams to teaspoons using grams per teaspoon.

Estimate gravel volume and approximate weight.

Calculate GMROI from gross margin dollars and average inventory cost.

Calculate GMV from order count and average order value.

Calculate gross profit from revenue and cost of goods sold.

Calculate GRM from property price and gross annual rent.

Calculate GRR excluding expansion revenue.

Estimate gross scheduled income from rental units, rent, and occupancy period.

Estimate grout volume from tile size, joint width, depth, and area.

Estimate gutter length and downspout count for a roof edge.

Calculate harmonic mean for rates or ratios.

Estimate training heart-rate zones from age.

Estimate potential home energy savings from switching heating usage to a heat pump.

Convert hectares to acres.

Estimate interest-only or amortized home equity line of credit payments.

Convert frequency to seconds per cycle.

Convert a hexadecimal number to decimal.

Add, subtract, multiply, or divide hexadecimal numbers.

Calculate yearly and long-term HOA cost from monthly dues.

Estimate an affordable monthly housing payment from income and debt.

Calculate estimated home equity and equity percentage.

Estimate profit from selling a home after purchase price, improvements, mortgage payoff, and selling costs.

Convert honey cups to grams using a typical honey density.

Convert mechanical horsepower to kilowatts.

Convert horsepower to kilowatts.

Convert hourly rate and weekly hours into weekly, monthly, and annual income.

Convert hourly pay into weekly, monthly, and annual salary estimates.

Calculate hours until a future date and time.

Estimate months needed to reach a savings goal.

Estimate time to walk one mile from walking speed.

Estimate how long a balance lasts with monthly withdrawals.

Estimate steps per mile from stride length.

Estimate health savings account growth from contributions and returns.

Estimate HVAC cooling tonnage from square footage and BTU per square foot.

Estimate extra water needs from exercise duration and sweat rate.

Estimate daily water intake from body weight using a simple ml/kg rule.

Estimate ideal body weight using height and sex.

Estimate a running weight target from current weight and target body fat percentage.

Estimate ideal body weight using height.

Estimate a general healthy weight range from height using BMI 18.5 to 24.9.

Convert inch-pounds to foot-pounds.

Convert inches to feet.

Compare a salary with inflation to estimate equivalent purchasing power.

Estimate future buying power after inflation.

Calculate an ingredient as a percentage of total recipe weight.

Estimate insulation bags or rolls needed from area and coverage.

Calculate integer addition, subtraction, multiplication, division, and remainder.

Calculate the monthly interest-only payment on a loan.

Calculate the interest-only monthly mortgage payment.

Estimate annual interest rate from principal, final amount, and years.

Approximate IRR for an initial investment and equal yearly cash flows.

Calculate Q1, Q3, and interquartile range.

Estimate inventory carrying cost percentage from storage, insurance, capital, and service costs.

Estimate days of inventory on hand from average inventory and cost of goods sold.

Calculate inventory turnover from cost of goods sold and average inventory.

Calculate the inverse of a 2×2 matrix.

Find the original value before a percentage increase or decrease.

Estimate future investment value with monthly contributions and annual return.

Calculate invoice subtotal, tax, discount, and final total.

Estimate future IRA balance from yearly contributions and expected return.

Estimate IRA contribution growth over time with regular annual contributions.

Estimate internal rate of return from an initial investment and future cash flows.

Estimate joists needed for a deck or floor span using spacing.

Convert joules to small calories and food kilocalories.

Calculate training heart-rate targets using resting heart rate and intensity.

Convert kilograms to stone and remaining pounds.

Convert kilojoules to food Calories.

Convert kilojoules to food Calories/kilocalories.

Calculate kWh from watts and hours of use.

Convert kilowatts to mechanical horsepower.

Calculate kinetic energy from mass and velocity.

Convert knots to miles per hour for boating, aviation, and wind speed.

Convert kilopascals to pounds per square inch.

Convert kilowatts to horsepower.

Convert kilowatt-hours to British thermal units.

Convert kilowatt-hours to joules.

Calculate labor cost as a percentage of revenue.

Calculate land area from length and width, then convert to square feet and acres.

Estimate landscaping rock volume and tons from area and depth.

Calculate the third side of a triangle from two sides and the included angle.

Use the law of sines to estimate a missing side from a known side and two angles.

Estimate lawn mowing cost from lawn area and price per thousand square feet.

Estimate grass seed needed from lawn area and seeding rate.

Calculate least common multiple of two numbers.

Calculate how many leads convert into customers.

Estimate lean body mass from weight and body fat percentage.

Estimate lease buyout cost from remaining payments, residual value, and fees.

Estimate electricity and cost savings when switching bulbs to LED.

Convert meters to feet, inches, kilometers, and miles.

Solve a simple linear equation ax + b = c.

Add lengths to estimate total linear feet for trim, boards, fencing, or edging.

Estimate a value between two known points using linear interpolation.

Convert fuel consumption from L/100km to US miles per gallon.

Convert liters to us fluid ounces.

Estimate metric tonnes from liters and density in kg/L.

Estimate monthly loan payment, total repayment, and interest.

Compare two loan offers by monthly payment and total interest.

Compare estimated total cost of buying with a loan versus leasing.

Estimate payoff time and interest for a loan balance.

Calculate loan-to-value ratio for a home, vehicle, or asset purchase.

Calculate logarithm of a number using a custom base.

Calculate quotient and remainder for integer division.

Calculate the ratio between customer lifetime value and customer acquisition cost.

Estimate customer lifetime value from average order, purchase frequency, and lifespan.

Estimate board feet and material cost from lumber dimensions.

Estimate watts from lumens and bulb efficiency.

Split daily calories into protein, carbs, and fat targets.

Calculate calories from grams of protein, carbs, and fat.

Convert calorie targets and macro percentages into grams of protein, carbs, and fat.

Estimate daily maintenance calories from BMR and activity multiplier.

Calculate marathon pace from target finish time.

Estimate the stock price where a margin account may receive a margin call.

Calculate margin of error for a proportion from z-score, proportion, and sample size.

Calculate MER from revenue and marketing spend.

Estimate marketplace fee and seller payout.

Calculate markup percentage from cost and selling price.

Calculate 2×2 matrix determinant and inverse helper values.

Estimate maximum heart rate from age using common formulas.

Add food item calories to estimate total meal calories.

Calculate portions, total meals, and estimated containers for meal prep.

Calculate the arithmetic mean of a list of numbers.

Calculate mean, median, and mode from a list of numbers.

Estimate meat thawing time for refrigerator or cold-water thawing.

Calculate the median middle value of a list of numbers.

Estimate the labor cost of a meeting.

Estimate metabolic age from BMR compared with an expected BMR reference.

Convert meters per second to miles per hour for speed, physics, weather, and engineering calculations.

Convert meters per second to miles per hour.

Convert meters to feet and remaining inches.

Convert micrograms to grams.

Convert micrograms to milligrams.

Find the midpoint between two coordinate points.

Convert miles per hour to meters per second.

Calculate electric vehicle efficiency in miles per kWh.

Estimate steps from miles and steps per mile.

Convert standard 12-hour time to 24-hour military time and back.

Convert milk cups to grams for recipes.

Convert milligrams to grams.

Convert millimeters to inches.

Convert millions to billions and billions to millions.

Estimate a credit card minimum payment using percent plus fees.

Calculate minutes and hours between two times.

Add, subtract, multiply, or divide two mixed numbers.

Convert a mixed number into a decimal.

Convert milliliters to US cups.

Convert milliliters to grams using density.

Convert millimeters of mercury to kilopascals.

Find the most frequent value in a list of numbers.

Calculate the remainder after division.

Estimate molar mass from common atom counts for C, H, O, N, Na, and Cl.

Calculate molarity from moles of solute and solution volume.

Count cash total from bill and coin quantities.

Estimate money market account balance with monthly deposits.

Calculate monthly and annual rent per square foot for apartments, offices, or rental spaces.

Calculate approximate months and days between two dates.

Estimate mortar volume needed for masonry joints.

Estimate mortgage APR after adding lender fees and closing costs to loan cost.

Estimate monthly mortgage payment with optional property tax, insurance, HOA, and PMI placeholders.

Compare two mortgage options by monthly payment and total interest.

Estimate income needed for a mortgage payment using a debt-to-income target.

Estimate monthly income needed for a target mortgage payment and debt-to-income ratio.

Estimate how extra monthly payments can shorten a mortgage payoff timeline.

Estimate break-even time for buying mortgage discount points.

Estimate interest savings from an additional one-time mortgage prepayment.

Estimate payment savings and break-even time from buying down a mortgage interest rate.

Estimate moving cost from distance, movers, hours, truck, and extra fees.

Convert US miles per gallon to liters per 100 km.

Estimate MPGe from miles per kWh using 33.7 kWh per gallon equivalent.

Convert miles per hour to knots.

Calculate monthly recurring revenue from customers and average subscription price.

Calculate monthly recurring revenue growth from starting and ending MRR.

Estimate mulch volume in cubic feet and cubic yards.

Convert nautical miles to kilometers.

Estimate net carbohydrates from total carbs, fiber, and sugar alcohols.

Calculate net effective monthly rent after free months or concessions.

Estimate net income after a flat tax or deduction percentage.

Estimate NPV from initial cost, yearly cash flow, discount rate, and years.

Calculate net profit after expenses.

Calculate NPS from promoters, passives, and detractors.

Calculate NRR from starting MRR, expansion, contraction, and churn.

Calculate net sales after returns, discounts, and allowances.

Calculate current ratio style working capital coverage from current assets and current liabilities.

Calculate net worth from total assets and liabilities.

Convert newton-meters to foot-pounds.

Convert newtons to pounds-force.

Calculate net operating income for a rental or income property.

Convert an effective annual rate into a nominal annual rate for a compounding frequency.

Calculate the nth root of a number.

Convert a number or decimal into a percent.

Convert a number into English words for checks, invoices, and writing.

Calculate voltage, current, resistance, and power using Ohm’s law.

Convert cooking oil cups to grams using average oil density.

Convert oil amount to an approximate butter amount for recipes.

Estimate VO2 max from a one-mile walk test using time, heart rate, age, sex, and weight.

Estimate one-rep max from lifted weight and reps.

Calculate operating margin from operating income and revenue.

Calculate operating profit from revenue, COGS, and operating expenses.

Estimate profit or loss for a simple call or put option at expiration.

Convert US fluid ounces to cups.

Convert ounces to grams.

Convert US fluid ounces to milliliters.

Convert ounces to pounds.

Convert oven temperature between Fahrenheit and Celsius.

Calculate regular pay, overtime pay, and total weekly pay.

Calculate pace per kilometer from distance and time.

Calculate running pace per kilometer from distance and time.

Convert running pace per mile into speed in miles per hour.

Estimate paint needed from wall area and coverage.

Estimate paint project cost from gallons and price.

Estimate paint needed for small touch-up areas.

Estimate baking pan volume from shape and dimensions.

Convert pascals to pounds per square inch.

Estimate dry pasta needed from number of servings.

Estimate patio or walkway pavers needed from area and paver size.

Calculate new salary, raise amount, and raise percentage.

Calculate how long it takes to recover an investment from annual cash flow.

Estimate take-home paycheck after tax and deductions.

Estimate future paycheck dates from a start date and pay frequency.

Estimate PayPal-style transaction fees using a percentage plus fixed fee.

Estimate payroll tax withholding from gross pay and tax percentages.

Estimate annual pension using salary, years of service, and pension multiplier.

Calculate percent error between an experimental value and an accepted value.

Convert a percent into decimal form.

Convert a percent into a simplified fraction.

Calculate percentages, parts, totals, increases, and decreases.

Find the percentage increase or decrease from an old value to a new value.

Calculate percentage error from measured and true values.

Calculate percentage point difference between two percentages.

Estimate a percentile value from a list of numbers.

Calculate permutations nPr.

Estimate personal-loan payment with optional origination fee and monthly add-on costs.

Calculate pH from hydrogen ion concentration.

Convert pints to cups.

Calculate pizza dough ingredient weights using baker percentages.

Estimate how many plants fit in a rectangular bed using plant spacing.

Estimate plywood sheets needed from project area and sheet size.

Create point-slope form from a point and slope.

Find the degree of a polynomial from its exponents.

Estimate pond liner size from pond length, width, depth, and overlap.

Estimate pond volume in gallons from length, width, and average depth.

Estimate how long it takes to fill a pool from volume and hose flow rate.

Estimate pool water volume in gallons.

Calculate weighted portfolio return from asset weights and returns.

Estimate concrete needed for round fence, deck, or mailbox post holes.

Calculate gravitational potential energy.

Convert pounds-force to newtons.

Convert pounds to cups using grams per cup.

Estimate due date from last menstrual period.

Estimate pregnancy month from pregnancy week for general planning.

Estimate pregnancy week from last menstrual period date.

Estimate today’s value of a future amount.

Calculate property or project price per square foot.

Calculate P/E ratio from share price and earnings per share.

Compare home price to annual rent using a price-to-rent ratio.

Find the prime factorization of a whole number.

Check whether a number is prime.

Estimate monthly PMI cost from loan amount and annual PMI rate.

Calculate probability from favorable outcomes and total outcomes.

Convert probability to percentage and odds.

Calculate output per hour or per worker.

Calculate gross profit and profit margin percentage.

Calculate profit per order after product cost, fees, shipping, and ads.

Calculate profit per item sold.

Calculate profit percentage from cost and selling price.

Estimate annual and monthly property insurance cost from home value and rate.

Estimate monthly and annual property management fees from rent and fee percentage.

Estimate yearly and monthly property tax.

Estimate prorated property taxes between buyer and seller by closing date.

Solve a proportion of the form a/b = c/x.

Estimate daily protein target from body weight and grams per kg.

Convert protein grams into calories and percentage of daily calories.

Split a daily protein target across meals.

Calculate the hypotenuse from two right-triangle legs.

Solve ax² + bx + c = 0 using the quadratic formula.

Estimate quarterly tax payment from annual income and estimated tax rate.

Convert quarts to cups.

Calculate quick ratio from liquid assets and current liabilities.

Predict running race time from a known distance and time using the Riegel formula.

Convert angular velocity from radians per second to RPM.

Estimate rainwater collection from roof area and rainfall.

Calculate the range of a set of numbers.

Simplify a two-number ratio.

Convert a part-to-whole ratio into a percentage.

Estimate reading time from word count and reading speed.

Estimate real return after inflation.

Estimate number and cost of rebar pieces needed.

Estimate number of rebar pieces across a slab width using spacing.

Calculate recipe cost and cost per serving from ingredient costs.

Calculate per-serving calories and macros from recipe totals.

Scale recipe ingredient quantities from original servings to target servings.

Estimate how many months it takes for refinance savings to cover closing costs.

Compare old and new loan payments to estimate monthly savings.

Estimate monthly and lifetime savings from refinancing a loan or mortgage.

Calculate refund rate from refunded orders and total orders.

Calculate relative error and percent relative error.

Estimate a comfortable monthly rent from income and target rent percentage.

Calculate new rent after a percentage increase.

Split rent between roommates by room size or share percentage.

Compare rough monthly rent cost against estimated monthly ownership cost.

Compare monthly rent to income and calculate rent-to-income percentage.

Estimate monthly rental cash flow after mortgage and operating expenses.

Estimate rental property ROI from income, expenses, financing, and cash invested.

Calculate gross rental yield from annual rent and property value.

Estimate annual and monthly renters insurance cost from coverage and rate.

Calculate repeat purchase rate from repeat customers and total customers.

Estimate an RMD from retirement account balance and distribution period.

Calculate resistance from voltage and current.

Calculate resistance from digit bands, multiplier, and tolerance.

Calculate equivalent resistance for two resistors in parallel.

Calculate equivalent resistance for resistors in series.

Calculate food cost percentage for a menu item.

Estimate training zones using age and resting heart rate with the heart-rate reserve method.

Estimate resting metabolic rate from weight, height, age, and sex.

Estimate retaining wall blocks needed from wall dimensions and block face size.

Calculate customer retention rate over a period.

Estimate retirement savings at retirement from current savings, contributions, return, and years.

Calculate return on sales from operating profit and net sales.

Calculate product return rate from returned orders and total orders.

Calculate revenue churn rate from lost recurring revenue and starting MRR.

Calculate revenue growth percentage between two periods.

Calculate revenue per employee for productivity benchmarking.

Calculate revenue per visitor for ecommerce or website traffic.

Annualize current revenue to estimate revenue run rate.

Calculate pre-tax price from a total that already includes sales tax.

Remove VAT from a VAT-inclusive price.

Calculate water needed for cooking rice using a chosen water-to-rice ratio.

Calculate hypotenuse, area, and perimeter from two legs of a right triangle.

Calculate return on ad spend.

Calculate return on investment percentage.

Convert a calendar date into a Roman numeral date format.

Convert a number to Roman numerals.

Calculate roof pitch from rise and run.

Estimate roofing shingle bundles from roof area and bundles per square.

Estimate roofing area and number of roofing squares.

Calculate room floor area.

Estimate cooling BTU needed from room area and adjustment factor.

Estimate paint gallons and cost for room walls.

Estimate future Roth IRA balance and contribution growth.

Round a number to a selected number of decimal places.

Convert revolutions per minute to angular velocity in radians per second.

Estimate how long it takes money to double at a fixed return rate.

Estimate calories burned while running from weight and distance.

Estimate running time from distance and pace.

Estimate how many months cash will last.

Estimate annual and monthly retirement withdrawals from portfolio size and withdrawal rate.

Convert annual salary to monthly, weekly, daily, and hourly estimates.

Convert annual salary into estimated hourly pay.

Calculate sales tax and total price after tax.

Calculate salt percentage for dough, brine, or fermentation recipes.

Estimate sample size for a proportion using confidence and margin of error.

Estimate sand volume and weight from area and depth.

Calculate the monthly saving needed to reach a goal.

Calculate savings rate from income and savings.

Estimate how long savings may last with monthly withdrawals and optional growth.

Calculate powers, roots, sine, cosine, tangent, and logarithms.

Convert a number to scientific notation.

Estimate self-employment tax from net business income using a simple percentage.

Calculate sell-through rate from units sold and starting inventory.

Estimate seller closing costs from sale price, commission, taxes, and fees.

Estimate seller concession amount as a percentage of purchase price.

Estimate home sale proceeds after mortgage payoff, agent commission, and seller costs.

Estimate shipping cost from weight, distance rate, base fee, and package count.

Calculate profit or loss from shipping charged vs shipping cost.

Round a number to a chosen number of significant figures.

Calculate simple interest over time.

Reduce a fraction to its simplest form.

Estimate future sinking fund balance from regular deposits and interest.

Calculate monthly deposit needed to reach a future savings target.

Estimate systematic investment plan growth from monthly investment.

Estimate wake-up or bedtime options based on 90-minute sleep cycles.

Estimate weekly sleep debt from needed sleep and actual sleep.

Calculate sleep duration from bedtime and wake time.

Calculate bedtime or wake time using 90-minute sleep cycles.

Find slope from two coordinate points.

Find slope-intercept form from slope and a point.

Add calories from smoothie ingredients and calculate calories per serving.

Calculate days since a sobriety start date.

Estimate the age where delaying benefits catches up to taking benefits earlier.

Estimate sod rolls and cost for a lawn area.

Estimate topsoil or garden soil volume from area and depth.

Estimate how many solar panels are needed from monthly kWh use and sun hours.

Calculate flour and water contained in sourdough discard.

Calculate flour and water needed to feed a sourdough starter at a chosen ratio.

Calculate sourdough starter hydration percentage from flour and water.

Convert kilometers per hour to miles per hour and meters per second.

Solve for travel time from distance and speed.

Calculate sphere volume and surface area from radius.

Estimate sprinkler runtime to apply a target depth of water.

Convert square feet to acres.

Convert area to volume using depth in feet.

Convert area to cubic yards using depth in inches.

Convert project area into linear feet using material width.

Convert square feet to square meters.

Calculate square footage from length and width in feet.

Convert square meters to square feet.

Calculate the square root of a number.

Simplify square roots by factoring out perfect squares.

Estimate stair riser height from total rise and number of steps.

Estimate carpet area needed for stairs from tread, riser, width, and stair count.

Estimate stair risers, tread count, and stringer length.

Calculate mean, variance, and standard deviation from comma-separated numbers.

Convert Ax + By = C into y = mx + b form.

Calculate count, sum, mean, median, min, max, and range.

Calculate walking or running cadence from total steps and time.

Estimate calories burned from steps and calories per step.

Convert steps to kilometers using stride length.

Convert step count into estimated miles.

Calculate average share price after multiple purchases.

Calculate stockout rate from stockout events and total demand events.

Convert stone to pounds.

Estimate average stride length from distance and step count.

Estimate card processing fees using a percentage plus fixed fee.

Estimate wall studs needed from wall length and spacing.

Estimate student loan repayment with optional extra monthly payment.

Calculate the sum of an arithmetic or geometric series.

Calculate customer support cost per ticket.

Calculate rectangular prism surface area.

Calculate swimming pace per 100 meters from distance and total time.

Convert tablespoons to grams using grams per tablespoon.

Convert tablespoons to teaspoons.

Estimate take-home pay after tax, benefits, and other deductions.

Estimate target heart rate zone from age and intensity.

Calculate target pace from goal time and race distance.

Estimate time to reach a target weight from weekly change.

Compare a tax-free yield with an equivalent taxable yield.

Estimate taxable income after deductions.

Estimate total daily energy expenditure from BMR and activity level.

Convert teaspoons to grams using grams per teaspoon.

Convert teaspoons to milliliters.

Convert Celsius to Fahrenheit and Kelvin.

Calculate test percentage and letter-style score from points earned.

Estimate thinset bags needed from tile area and bag coverage.

Estimate number of tiles needed for an area.

Calculate overtime pay at 1.5× hourly rate.

Calculate total work hours from start time, end time, and break minutes.

Calculate the duration between two times.

Calculate the hour difference between two UTC offsets.

Calculate tip amount, tip per person, total bill, and total per person.

Calculate bill, tip, and per-person split.

Estimate how many bags of topsoil are needed for an area and depth.

Estimate topsoil volume in cubic yards.

Convert torque between newton-meters, foot-pounds, and inch-pounds.

Calculate horsepower from torque and RPM.

Compare simplified after-tax retirement value between Traditional IRA and Roth IRA contributions.

Estimate T-bill discount yield and investment return from price, face value, and days to maturity.

Calculate triangle area from base and height.

Estimate turkey cooking time from weight and minutes per pound.

Estimate turkey weight needed for guests.

Calculate typing speed in words per minute.

Convert common length, weight, and temperature units.

Calculate average units per transaction from units sold and orders.

Calculate weighted university grade from marks and credits.

Calculate utilization rate from billable hours and available hours.

Calculate rental vacancy rate from vacant units and total units.

Calculate population and sample variance from a list of numbers.

Add or remove VAT from a price.

Estimate siding squares needed after openings and waste.

Estimate VO2 max from resting and maximum heart rate using a common formula.

Estimate voltage drop from current, wire resistance, and cable length.

Calculate box volume from length, width, and height.

Calculate waist-to-height ratio.

Calculate waist-to-hip ratio from body measurements.

Estimate calories burned while walking from weight and distance.

Calculate walking pace and speed from distance and time.

Calculate walking speed from distance and time.

Estimate how long a walk will take from distance and walking speed.

Calculate wall area from wall width and height.

Estimate wallpaper rolls needed from wall area and roll coverage.

Estimate a water bill from usage, rate, and fixed charges.

Estimate water flow from pipe diameter and water velocity.

Estimate daily water intake from body weight.

Estimate water needed for rice from rice amount and water ratio.

Convert watts to amps at selected volts.

Convert watts to BTU per hour for heating and cooling estimates.

Calculate wavelength from wave speed and frequency.

Find the ISO week number for a date.

Estimate weekly gross pay from salary or hourly rate.

Calculate weeks and days between two dates.

Calculate weight change amount and percentage between two weights.

Convert kilograms to pounds, ounces, grams, and stones.

Estimate calorie deficit needed to lose a target amount of weight.

Calculate a weighted average from values and weights.

Calculate a weighted grade from three grade/weight pairs.

Calculate waist-to-hip ratio from waist and hip measurements.

Calculate total window glass area from width, height, and quantity.

Calculate mechanical work from force and distance.

Calculate total work hours from start time, end time, and break length.

Calculate working capital from current assets and current liabilities.

Convert between instant, active dry, and fresh yeast amounts.

Calculate a z-score from value, mean, and standard deviation.

Calculate the present price of a zero-coupon bond from face value, yield, and maturity.