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A readable directory of free browser-based calculators and converters. Browse by category, jump to a topic, or search by calculator name.
Calculator categories
Jump to a category, then open the exact calculator you need.
Popular starting calculators
Common calculators visitors often need first.
Mortgage CalculatorMoneyLoan CalculatorMoneyPercentage CalculatorMathBMI CalculatorHealthScientific CalculatorMathCompound Interest CalculatorMoneyTip CalculatorMoneyDate CalculatorDate & TimeConcrete CalculatorConstructionCups to Grams CalculatorCookingSalary CalculatorMoneyUnit ConverterConverters
Money Calculators
Loans, mortgages, savings, retirement, investing, taxes, real estate, salary, and everyday money decisions.
401k Calculator401k Match Calculator529 College Savings CalculatorAdjustable Rate Mortgage CalculatorAfter-Tax Return CalculatorAmortization CalculatorAnnual Income CalculatorAnnual Percentage Yield CalculatorAnnuity CalculatorAppraisal Gap CalculatorAPR CalculatorAPR to Monthly Rate CalculatorAsset Allocation CalculatorAuto Loan CalculatorBack-End Ratio CalculatorBalance Transfer CalculatorBalloon Payment CalculatorBiweekly Mortgage Payment CalculatorBiweekly Paycheck CalculatorBond Price CalculatorBond Yield CalculatorBreak Even Rent CalculatorBreak Even Stock Price CalculatorBridge Loan CalculatorBudget CalculatorBuyer Closing Cost CalculatorCAGR CalculatorCap Rate CalculatorCapEx Reserve CalculatorCapital Gains Tax EstimatorCar Affordability CalculatorCash on Cash Return CalculatorCash-Out Refinance CalculatorCashback CalculatorCD Ladder CalculatorClosing Cost CalculatorCombined Loan to Value CalculatorCompound Interest CalculatorCost of Living CalculatorCredit Card Interest CalculatorCredit Card Payoff CalculatorCredit Utilization CalculatorDaily Compound Interest CalculatorDebt Consolidation CalculatorDebt Payoff CalculatorDebt Yield CalculatorDebt-to-Income CalculatorDiscount CalculatorDividend Payout Ratio CalculatorDividend Reinvestment CalculatorDividend Yield CalculatorDollar Cost Averaging CalculatorDown Payment CalculatorDown Payment Savings CalculatorEffective Annual Rate CalculatorEffective Interest Rate CalculatorEmergency Fund CalculatorEmergency Savings Months CalculatorEscrow CalculatorEscrow Shortage CalculatorExpense Ratio CalculatorExtra Payment Mortgage CalculatorFinancial Independence CalculatorFIRE Number Calculator
Showing 64 of 183. View all Money calculators.
Math Calculators
Percentages, fractions, algebra, geometry, statistics, scientific math, number systems, and classroom helpers.
Absolute Value CalculatorAnnular Ring Area CalculatorArithmetic Sequence CalculatorAspect Ratio CalculatorAverage CalculatorBase ConverterBinary CalculatorCircle Area CalculatorCircle CalculatorCombination CalculatorComplex Number CalculatorCone Volume CalculatorConfidence Interval CalculatorCube Root CalculatorCylinder Volume CalculatorDecimal to Fraction CalculatorDecimal to Mixed Number CalculatorDecimal to Percent CalculatorDensity CalculatorDeterminant CalculatorDistance Between Points CalculatorDistance Formula CalculatorEquivalent Fractions CalculatorExpected Value CalculatorExponent CalculatorExponential Growth CalculatorFactorial CalculatorFraction CalculatorFraction to Decimal CalculatorFraction to Percent CalculatorGCD CalculatorGeometric Mean CalculatorGeometric Sequence CalculatorHarmonic Mean CalculatorHex to Decimal CalculatorHexadecimal CalculatorInteger CalculatorInterquartile Range CalculatorInverse Matrix CalculatorInverse Percentage CalculatorLaw of Cosines CalculatorLaw of Sines CalculatorLCM CalculatorLinear Equation CalculatorLinear Interpolation CalculatorLogarithm CalculatorLong Division CalculatorMargin of Error CalculatorMatrix CalculatorMean CalculatorMean Median Mode CalculatorMedian CalculatorMidpoint CalculatorMixed Number CalculatorMixed Number to Decimal CalculatorMode CalculatorModulo CalculatorNth Root CalculatorNumber to Percent CalculatorNumber to Words CalculatorPercent Error CalculatorPercent to Decimal CalculatorPercent to Fraction CalculatorPercentage Calculator
Showing 64 of 104. View all Math calculators.
Health Calculators
Fitness, calories, body measurements, walking, running, sleep, pregnancy, and general wellness estimates.
Army Body Fat CalculatorBMI CalculatorBMI Imperial CalculatorBMI Prime CalculatorBMR CalculatorBody Adiposity Index CalculatorBody Fat CalculatorBody Fat Navy CalculatorBody Frame Size CalculatorBody Roundness Index CalculatorBody Surface Area CalculatorBody Water CalculatorCaffeine CalculatorCalorie CalculatorCalorie Deficit CalculatorCalorie to Gram CalculatorCalories Burned CalculatorCalories Per Meal CalculatorCarbohydrate Intake CalculatorCooper Test CalculatorCorrected Calcium CalculatorCycling Speed CalculatorDaily Water Intake CalculatorDue Date by Conception Date CalculatorFat Intake CalculatorFiber CalculatorGram to Calorie CalculatorHeart Rate Zone CalculatorHow Long to Walk a Mile CalculatorHow Many Steps in a Mile CalculatorHydration by Activity CalculatorHydration by Weight CalculatorIdeal Body Weight CalculatorIdeal Running Weight CalculatorIdeal Weight CalculatorIdeal Weight Range CalculatorKarvonen Heart Rate CalculatorKilojoules to Calories CalculatorLean Body Mass CalculatorMacro CalculatorMacro Calories CalculatorMacro Split CalculatorMaintenance Calorie CalculatorMarathon Pace CalculatorMax Heart Rate CalculatorMeal Calorie CalculatorMetabolic Age CalculatorMiles to Steps CalculatorNet Carbs CalculatorOne Mile Walk Test CalculatorOne Rep Max CalculatorPace Per Kilometer CalculatorPace to Speed CalculatorPregnancy Due Date CalculatorPregnancy Month CalculatorPregnancy Week CalculatorProtein CalculatorProtein Calorie CalculatorProtein Per Meal CalculatorRace Time Predictor CalculatorResting Heart Rate Zone CalculatorResting Metabolic Rate CalculatorRunning Calorie CalculatorRunning Time Calculator
Showing 64 of 90. View all Health calculators.
Date & Time Calculators
Age, dates, time duration, business days, countdowns, week numbers, and schedule calculators.
Add Business Days CalculatorAge CalculatorAge Difference CalculatorBaby Age CalculatorBirthday CalculatorBusiness Days Between Dates CalculatorChronological Age CalculatorCountdown CalculatorDate CalculatorDays Between Dates CalculatorDays From Today CalculatorDays Since Date CalculatorDays Until CalculatorDecimal Hours to Hours Minutes CalculatorDue Date Countdown CalculatorGeneration CalculatorHours Until CalculatorMilitary Time ConverterMinutes Between Times CalculatorMonths Between Dates CalculatorPaycheck Date CalculatorTime Duration CalculatorTime Zone Difference CalculatorWeek Number CalculatorWeeks Between Dates CalculatorWork Hours Calculator
Construction Calculators
Concrete, flooring, paint, roofing, fencing, soil, home materials, energy, and project estimation tools.
Appliance Energy Cost CalculatorAquarium Volume CalculatorArea CalculatorAsphalt CalculatorAsphalt Tonnage CalculatorAttic Ventilation CalculatorBaseboard Trim CalculatorBlinds Size CalculatorBoard Foot CalculatorBrick CalculatorBTU CalculatorCarpet CalculatorCaulk CalculatorCBM CalculatorCeiling Fan Size CalculatorCompost CalculatorConcrete Bag CalculatorConcrete CalculatorConcrete Column CalculatorConcrete Cost CalculatorConcrete Footer CalculatorConcrete Slab CalculatorConcrete Slab Cost CalculatorCrown Molding CalculatorCubic Feet CalculatorCubic Yards CalculatorCurtain Size CalculatorDeck Board Spacing CalculatorDeck Stain CalculatorDecking CalculatorDoor Area CalculatorDriveway Sealer CalculatorDrywall CalculatorFence CalculatorFence Cost CalculatorFence Gate CalculatorFence Paint CalculatorFence Post Spacing CalculatorFertilizer Rate CalculatorFlooring CalculatorGarage Epoxy CalculatorGarden Bed Soil CalculatorGravel CalculatorGrout CalculatorGutter CalculatorHVAC Tonnage CalculatorInsulation CalculatorJoist Spacing CalculatorLand Area CalculatorLandscaping Rock CalculatorLawn Mowing Cost CalculatorLawn Seed CalculatorLED Savings CalculatorLinear Feet CalculatorLumber CalculatorMiles Per kWh CalculatorMortar CalculatorMPGe CalculatorMulch CalculatorPaint CalculatorPaint Cost CalculatorPaint Touch Up CalculatorPaver CalculatorPlant Spacing Calculator
Showing 64 of 101. View all Construction calculators.
Converters Calculators
Unit conversion tools for length, weight, volume, area, speed, pressure, energy, power, cooking, and science.
Acres to Square Feet CalculatorAcres to Square Meters CalculatorAmps to Watts CalculatorATM to PSI CalculatorBTU to kWh CalculatorCalories to Joules CalculatorCentimeters to Feet CalculatorCFM to Cubic Meters per Hour CalculatorCubic Feet to Cubic Yards CalculatorCubic Feet to Gallons CalculatorCubic Feet to Liters CalculatorCubic Inches CalculatorCubic Yards to Tons CalculatorDensity ConverterEV Charging Cost CalculatorFeet Per Second to Miles Per Hour CalculatorFeet to Inches CalculatorFeet to Meters CalculatorFlow Rate ConverterFrequency ConverterGallons per Minute to Liters per Minute CalculatorGallons to Cubic Feet CalculatorGallons to Ounces CalculatorGallons to Pounds CalculatorGrams to Pounds CalculatorHectares to Acres CalculatorHertz to Seconds CalculatorHorsepower to Kilowatts CalculatorHorsepower to kW CalculatorInch-Pounds to Foot-Pounds CalculatorInches to Feet CalculatorJoules to Calories CalculatorKilograms to Stone and Pounds CalculatorKilojoules to Kilocalories CalculatorKilowatt Hours CalculatorKilowatts to Horsepower CalculatorKnots to MPH CalculatorkPa to PSI CalculatorkW to Horsepower CalculatorkWh to BTU CalculatorkWh to Joules CalculatorLength ConverterLiters per 100km to MPG CalculatorLiters to Ounces CalculatorLiters to Tons CalculatorLumens to Watts CalculatorMeters Per Second to Miles Per Hour CalculatorMeters per Second to MPH CalculatorMeters to Feet and Inches CalculatorMicrograms to Grams CalculatorMicrograms to Milligrams CalculatorMiles Per Hour to Meters Per Second CalculatorMilligrams to Grams CalculatorMillimeters to Inches CalculatorMillion to Billion ConvertermmHg to kPa CalculatorMPG to Liters per 100km CalculatorMPH to Knots CalculatorNautical Miles to Kilometers CalculatorNewton-Meters to Foot-Pounds CalculatorNewtons to Pound Force CalculatorOunces to Pounds CalculatorPascal to PSI CalculatorPound Force to Newtons Calculator
Showing 64 of 80. View all Converters calculators.
Business Calculators
Business metrics, ecommerce, margins, ratios, revenue, payroll, and operational planning calculators.
Absenteeism Rate CalculatorAccounts Payable Days CalculatorAccounts Payable Turnover CalculatorAccounts Receivable Days CalculatorAccounts Receivable Turnover CalculatorARPU CalculatorARR CalculatorAverage Order Value CalculatorAverage Revenue Per Account CalculatorBillable Hours CalculatorBounce Rate CalculatorBreak Even Revenue CalculatorBreak Even ROAS CalculatorBreak Even Sales CalculatorBreak-Even CalculatorBurn Multiple CalculatorBurn Rate CalculatorBusiness Loan CalculatorCart Abandonment Rate CalculatorCash Conversion Cycle CalculatorCash Runway CalculatorChargeback Rate CalculatorChurn Rate CalculatorCommercial Lease CalculatorCommission CalculatorContribution Margin CalculatorConversion Rate CalculatorConversion Value CalculatorCost Per Acquisition CalculatorCost Per Lead CalculatorCPC CalculatorCPM CalculatorCTR CalculatorCurrent Ratio CalculatorCustomer Acquisition Cost CalculatorCustomer Acquisition Payback CalculatorCustomer Churn Cost CalculatorCustomer Lifetime Value CalculatorDebt Service Coverage Ratio CalculatorDebt to Equity Ratio CalculatorDepreciation CalculatorDimensional Weight CalculatorDiscounted Cash Flow CalculatorEBITDA Margin CalculatorEcommerce Break Even ROAS CalculatorEmail Click Rate CalculatorEmail Conversion Rate CalculatorEmail Open Rate CalculatorEmployee Turnover Rate CalculatorFood Cost Percentage CalculatorFreelance Rate CalculatorGross Margin Return on Investment CalculatorGross Merchandise Value CalculatorGross Profit CalculatorGross Revenue Retention CalculatorInventory Carrying Cost CalculatorInventory Days CalculatorInventory Turnover CalculatorInvoice Total CalculatorLabor Cost Percentage CalculatorLead Conversion CalculatorLTV CAC Ratio CalculatorLTV CalculatorMarketing Efficiency Ratio Calculator
Showing 64 of 107. View all Business calculators.
Education Calculators
Grades, GPA, test scores, study helpers, reading, writing, classroom math, and student calculators.
Class Average CalculatorConcentration CalculatorDilution CalculatorExam Score Needed CalculatorFinal Grade CalculatorGPA CalculatorGPA to Percentage CalculatorGrade CalculatorMolar Mass CalculatorMolarity CalculatorpH CalculatorTest Grade CalculatorUniversity Grade CalculatorWeighted Grade Calculator
Engineering Calculators
Science, electrical, physics, mechanical, flow, energy, force, torque, and technical calculators.
Acceleration CalculatorAngular Velocity CalculatorBandwidth CalculatorCapacitor Charge CalculatorData Transfer CalculatorForce CalculatorKinetic Energy CalculatorOhm’s Law CalculatorPotential Energy CalculatorResistor CalculatorResistor Color Code CalculatorResistor Parallel CalculatorResistor Series CalculatorVoltage Drop CalculatorWavelength Frequency CalculatorWork Calculator
Everyday Calculators
Age, dates, time, tips, discounts, fuel, split bills, random numbers, Roman numerals, and quick daily tools.
Average Speed CalculatorDownload Time CalculatorElectricity Cost CalculatorFuel Cost CalculatorFuel Efficiency CalculatorGas Cost Per Mile CalculatorHeat Pump Savings CalculatorPace CalculatorReading Time CalculatorRoman Numeral Date ConverterSpeed Distance Time CalculatorTyping Speed CalculatorWater Bill Calculator
Cooking Calculators
Recipe scaling, ingredient conversions, baking ratios, serving estimates, food cost, and kitchen calculators.
Air Fryer ConverterBaker Percentage CalculatorBakers Yeast ConverterBaking Pan Size ConverterBatch Cooking CalculatorBread Hydration CalculatorBrine CalculatorButter ConverterButter Grams to Tablespoons CalculatorCake Batter CalculatorCake Pan ConverterCake Servings CalculatorCatering Serving CalculatorChicken Cooking Time CalculatorChocolate Cups to Grams CalculatorCocoa Powder Cups to Grams CalculatorCoffee Brew Strength CalculatorCoffee Ratio CalculatorCoffee Water Ratio CalculatorCold Brew Ratio CalculatorCookie Serving CalculatorCooking ConverterCooking Time Adjustment CalculatorCooking Time Per Pound CalculatorCups to Grams CalculatorCups to mL CalculatorCups to Tablespoons CalculatorDough Ball CalculatorEgg Size ConverterEspresso Ratio CalculatorFermentation Salt CalculatorFood Cost Per Portion CalculatorGrams to Cups CalculatorGrams to mL CalculatorGrams to Ounces CalculatorGrams to Tablespoons CalculatorGrams to Teaspoons CalculatorHoney Cups to Grams CalculatorIngredient Percentage CalculatorMeal Prep CalculatorMeat Thawing Time CalculatorMilk Cups to Grams CalculatormL to Cups CalculatormL to Grams CalculatorOil Cups to Grams CalculatorOil to Butter ConverterOunces to Cups CalculatorOunces to Grams CalculatorOunces to mL CalculatorOven Temperature ConverterPan Volume CalculatorPasta Serving CalculatorPints to Cups CalculatorPizza Dough CalculatorPounds and Cups CalculatorQuarts to Cups CalculatorRecipe Cost CalculatorRecipe Nutrition CalculatorRecipe Scale CalculatorRestaurant Food Cost CalculatorRice Water Ratio CalculatorSalt Percentage CalculatorSmoothie Calorie CalculatorSourdough Discard Calculator
Showing 64 of 74. View all Cooking calculators.