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356+ free online calculators — math, financial, science, health and everyday tools.

Mathematics
Fractions
Fractions CalculatorAdd FractionsMixed Numbers CalculatorSimplify FractionsComplex FractionsDecimal to FractionFraction to DecimalFraction to PercentPercent to FractionLCD CalculatorLCM CalculatorGCF CalculatorEquivalent FractionsOrdering FractionsComparing FractionsMixed to Improper FractionGolden Ratio Calculator
General Math
Basic CalculatorPercentage CalculatorRounding CalculatorLong Division CalculatorLong MultiplicationPrime FactorizationPrime Number CheckerBinary ConverterLog CalculatorExponent CalculatorHalf-Life CalculatorPercent Error CalculatorMatrix CalculatorFactors CalculatorModulo CalculatorScientific NotationSignificant FiguresPlace Value CalculatorExpanded Form CalculatorRatio CalculatorUnit Rate CalculatorSpeed Distance Time
Algebra
Quadratic FormulaExponents CalculatorSquare Root CalculatorCube Root CalculatorRadicals & RootsLogarithm CalculatorAbsolute Value CalculatorFOIL Method CalculatorPercent Change CalculatorPercent DifferencePercent Error CalculatorCompleting the SquareCubic Equation Solver
Percent
Percentage CalculatorPercentage IncreasePercentage DecreasePercent ChangePercent DifferencePercent ErrorPercent to DecimalDecimal to PercentFraction to PercentTip CalculatorDiscount Calculator
Statistics
Mean Median ModeStandard DeviationConfidence Interval CalculatorP-Value CalculatorSample Size CalculatorAverage CalculatorQuartile CalculatorPercentile CalculatorVariance CalculatorZ-Score CalculatorDescriptive StatisticsSum CalculatorRandom Number GeneratorRandom Name PickerCoin FlipperGrade CalculatorGPA CalculatorVote Percentage CalculatorStem and Leaf Plot
Discrete Math
Combinations (nCr)Permutations (nPr)Factorial Calculator n!Pascal's TriangleFibonacci CalculatorCombinations with ReplacementPermutations with Replacement
Geometry
↳ Plane Geometry
Circle CalculatorRectangle CalculatorSquare CalculatorRight Triangle CalculatorPythagorean TheoremParallelogram CalculatorRhombus CalculatorRegular Polygon CalculatorAnnulus CalculatorSlope CalculatorMidpoint CalculatorDistance Calculator 2DLaw of SinesLaw of Cosines
↳ Solid Geometry
Sphere CalculatorCylinder CalculatorCone CalculatorCube CalculatorRectangular PrismSquare PyramidHemisphere CalculatorCapsule CalculatorTriangular PrismTube CalculatorVolume CalculatorSurface Area CalculatorDistance Calculator 3D
↳ Trigonometry
Trig Functions CalculatorTrigonometric RatiosInverse Trig FunctionsTrig Function Graphs
Financial
Loan & Mortgage
↳ General Loans
Loan CalculatorSimple Loan CalculatorAdvanced Loan CalculatorLoan Repayment CalculatorHow Much Can I Borrow?EMI Loan CalculatorAmortization ScheduleCredit Card PayoffStudent Loan CalculatorBudget CalculatorRent Affordability CalculatorMortgage Payoff CalculatorDebt Payoff CalculatorDebt Consolidation CalculatorCollege Cost CalculatorTake-Home Pay CalculatorPension CalculatorSocial Security CalculatorIndia Home Loan EMIIndia Personal Loan EMIIndia Car Loan EMI
↳ Auto Loans
Car Loan CalculatorCar Payment CalculatorHow Much Car Can I Afford?
↳ Mortgage
Mortgage CalculatorMortgage Payment CalculatorMortgage RepaymentInterest-Only MortgageProperty Tax CalculatorHow Much House Can I Afford?Bolånekalkylator (Sverige)Privatlånekalkylator (Sverige)
Interest & APR
Simple Interest CalculatorCompound InterestAPR CalculatorEffective Annual RateEffective Interest RateNominal Interest RatePeriodic Interest Rate
Investing
Investment Growth CalculatorROI CalculatorCAGR CalculatorSavings Calculator401(k) CalculatorRoth IRA CalculatorSavings Goal CalculatorRetirement SavingsFuture Value CalculatorPresent Value CalculatorRule of 72 CalculatorBond CalculatorAverage Return CalculatorCommission CalculatorRental Property CalculatorCD Calculator
Sales & Tax
Sales Tax CalculatorVAT CalculatorReverse Sales TaxDiscount CalculatorMargin CalculatorMarkup CalculatorProfit CalculatorProfit Margin CalculatorSale Price CalculatorSelling Price CalculatorTip CalculatorInflation Calculator
Retirement
Retirement Savings CalculatorPresent Value of AnnuityFuture Value of AnnuityDeferred Annuity Calculator
Financial Ratios
Debt Ratios CalculatorLiquidity RatiosOperations RatiosProfitability RatiosStock Ratios Calculator
Depreciation
Depreciation CalculatorStraight Line DepreciationDouble Declining BalanceSum of Years DigitsUnits of ProductionReal Estate Depreciation
Money, Pay & Tax
Salary to HourlyHourly to SalaryGross Pay CalculatorTime Card CalculatorCurrency ConverterTax EstimatorSalary Inflation CalculatorMoney Counter
Practical
Time & Date
↳ Time Calculators
Hours CalculatorHours & Minutes CalculatorTime CalculatorWork Hours CalculatorTime Clock CalculatorCountdown TimerStopwatch TimerSunrise & Sunset Times
↳ Date Calculators
Age CalculatorDate Difference CalculatorDate CalculatorDays & Business DaysDay of the WeekHow Old Am I?
↳ Time Conversions
Time to DecimalDecimal to TimeMilitary Time ConverterMinutes to HoursHours to Minutes
Health & Fitness
BMI CalculatorBMI Calculator for WomenBody Fat CalculatorBMR CalculatorMacro CalculatorCalories Burned CalculatorProtein CalculatorIdeal Weight CalculatorPace CalculatorTarget Heart RatePregnancy CalculatorDue Date CalculatorConception CalculatorGestation CalculatorOne Rep Max CalculatorLean Body Mass CalculatorCarbohydrate CalculatorBody Surface Area CalculatorBAC CalculatorOvulation CalculatorPeriod Calculator
Construction
Square Footage CalculatorCubic Yards CalculatorCubic Feet CalculatorConcrete CalculatorMulch CalculatorGravel CalculatorPaint CalculatorFeet & Inches CalculatorTopsoil CalculatorTank Volume CalculatorRoad Base Calculator
Physics
Force CalculatorVelocity CalculatorKinetic EnergyGravitational Potential EnergyMomentum CalculatorDensity CalculatorPressure CalculatorWork CalculatorIdeal Gas LawHooke's Law CalculatorWavelength CalculatorE = mc² CalculatorFriction CalculatorImpulse Calculator
Chemistry
Molecular Weight CalculatorPercent Error Calculator
Technology
Aspect Ratio CalculatorPPI CalculatorStorage Units ConverterPassword GeneratorWhat is My IP Address?
Games & Sports
Random Number GeneratorDice RollerCoin FlipperLottery Number GeneratorBingo Number GeneratorPoker CalculatorOdds CalculatorGas Mileage CalculatorNFL Draft Pick ValueSudoku PuzzlesSleep Calculator
Engineering
Ohm's Law CalculatorHorsepower CalculatorBandwidth CalculatorStair CalculatorTile CalculatorRoofing Calculator
Weather
Wind Chill CalculatorHeat Index CalculatorBTU Calculator
Word Calculators
Numbers to WordsWord CounterCharacter CounterRandom Name PickerDigits to Words
Conversions
Unit Conversions
Weight / Mass ConverterLength / Distance ConverterVolume ConverterSpeed ConverterEnergy ConverterPressure ConverterPower ConverterForce ConverterDensity ConverterAngle ConverterAcceleration ConverterMetric Units Converter
Area Conversions
Area ConverterAcres to Square FeetSquare Feet to AcresSq Feet to Sq MetersSq Meters to Sq Feet
Length & Distance
Distance ConverterCentimeters to InchesInches to CentimetersMeters to FeetHeight ConverterKilograms to PoundsPounds to Kilograms
Temperature
Temperature ConverterCelsius to FahrenheitFahrenheit to CelsiusCelsius to KelvinKelvin to CelsiusFahrenheit to Kelvin
Time Conversions
Time ConverterMinutes to HoursHours to MinutesMinutes to DecimalMilitary Time Converter
Decimal, Fraction & Percent
Decimal to FractionFraction to DecimalDecimal to PercentPercent to DecimalFraction to PercentPercent to FractionMixed Number to Decimal
Other Conversions
Numbers to WordsRoman Numeral ConverterRoman Numeral DateScientific Notation ConverterCooking ConversionsStorage ConverterCurrency Converter

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