Calculators
Explore calculators tools with instant calculations, worked examples, clear instructions and formula sources.
Finance
Compound interest calculatorDiscount calculatorSalary calculatorSimple interest calculatorCar loan calculatorMortgage calculatorLoan amortization calculatorFuture value calculatorMargin calculatorSales tax calculatorSavings calculatorAPR calculatorCAGR calculatorCD calculatorDepreciation calculatorInflation calculatorInterest rate calculatorInvestment calculatorIRR calculatorMortgage refinance calculatorPresent value calculatorRetirement calculatorVAT calculatorAnnuity Payout CalculatorAPY Calculator – Effective Annual YieldCommission CalculatorCredit Card Payoff Calculator – Fixed Monthly PaymentsDebt-to-Income Ratio CalculatorMarkup Calculator – Cost to Selling PriceNet Present Value CalculatorOvertime Calculator – Gross PayPayback Period Calculator – Constant Cash FlowPrice per Square Foot CalculatorRent Budget CalculatorRental Property Calculator – Income and Cap Rate401(k) Calculator – Contributions and MatchROI Calculator – Net Investment ReturnRule of 72 CalculatorSavings Goal Calculator – Monthly DepositStock Average Calculator – Weighted Purchase CostBasis Point CalculatorBiweekly Pay CalculatorBond Price Calculator – Fixed CouponsBond Yield Calculator – Yield to MaturityBudget CalculatorCap Rate CalculatorCar Affordability CalculatorCar Lease CalculatorCash Back CalculatorCash-on-Cash Return CalculatorCredit Card Interest CalculatorCross Price Elasticity CalculatorDebt Consolidation CalculatorDiscounted Cash Flow Calculator – Five YearsDown Payment CalculatorEAR Calculator – Effective Annual RateFuture Value of Annuity CalculatorGDP Calculator – Expenditure ApproachGross Rent Multiplier CalculatorHouse Affordability CalculatorInterest-only mortgage calculatorTraditional IRA calculatorLease payment calculatorLoan-to-value calculatorMoney counterNet effective rent calculatorNet operating income calculatorNet worth calculatorPaycheck calculatorPayPal fee calculatorPresent value of annuity calculatorPrice elasticity of demand calculatorPrice elasticity of supply calculatorProrated rent calculatorPVIFA calculatorRate of return calculatorReal estate commission calculatorReturn on equity calculatorRoth IRA calculatorSalary inflation calculatorSales calculatorSIP calculatorUnit price calculatorWACC calculatorLoan calculator
Mathematics
Fraction calculatorPercentage change calculatorPercentage error calculatorRatio calculatorAdd fractionsBasic calculatorPercentage difference calculatorScientific calculatorSubtract fractionsConfidence Interval Calculator – Known Population SDCosine CalculatorCube Root CalculatorDot Product CalculatorExponential Growth CalculatorCompare Fractions CalculatorGolden Ratio CalculatorLaw of Cosines Calculator – Two Sides and Included AngleLaw of Sines Calculator – Two Angles and One SideMidpoint Calculator – 2D and 3DModulo CalculatorPercent to PPM CalculatorSine CalculatorTangent CalculatorUnit rate calculatorAbsolute value calculatorDecimal Degrees to Degrees Minutes SecondsDistance Between Two Points Calculator – 2D and 3DDouble Angle CalculatorDoubling Time CalculatorEllipse Calculator – Area, Axes and FociEmpirical Rule Calculator – 68–95–99.7Endpoint Calculator – From MidpointFibonacci Number CalculatorHalf Angle CalculatorPoint-Slope Form CalculatorPPM to Percent CalculatorReciprocal CalculatorSector Area CalculatorCircular Segment Area CalculatorTriangular Number CalculatorUnit Circle CalculatorWinning Percentage Calculatora+bi Form CalculatorA/B Test CalculatorAbsolute Difference CalculatorBilinear Interpolation CalculatorCeiling Function CalculatorComplex Conjugate CalculatorComplex Number CalculatorComplex Number to Polar Form CalculatorCondense Logarithms CalculatorCylindrical Coordinates CalculatorDecimal Odds CalculatorDegrees to Percent Slope CalculatorDegrees Minutes Seconds to Decimal DegreesDegrees of Freedom CalculatorCircle Diameter from Radius, Area or CircumferenceCone Diameter CalculatorCylinder Diameter from Volume and HeightDiameter to Radius CalculatorDiamond Problem SolverDice Average CalculatorDigital Root CalculatorDilution Ratio CalculatorRectangle Dimensions from Area and PerimeterDirect Variation CalculatorDrake Equation for Love CalculatorEstimating Fraction Sums and Differences CalculatorPercentage calculator
Number tools
decimal to fractionGCF calculatorLCM calculatorDecimal to percentageFraction to decimalLong division calculatorPrime factorization calculatorScientific notation calculatorFactors calculatorFraction to percentagehexadecimal arithmeticPercentage to decimalbinary arithmeticEquivalent fraction calculatorFactorial calculatorFraction to mixed numberMixed number to fractionpercent to fractionPrime number checker
Construction
gravel calculatorconcrete calculatorasphalt calculatorcubic yards calculatorsand calculatorBoard foot calculatorBrick calculatorDrywall calculatorElevation Grade CalculatorFence calculatorRafter Length CalculatorRoof Pitch CalculatorSquare Feet to Cubic YardsStair CalculatorTile calculatorWallpaper calculatorBaluster calculatorCarpet calculatorConcrete block calculatorConcrete block fill calculatorDecking calculatorFlooring calculatorFraming calculatorPaver calculatorPlywood calculatorPost hole concrete calculatorRebar calculatorRetaining wall calculatorRoofing Calculator
Home improvement
Statistics
Average calculatorstandard deviation calculatorvariance calculatorStatistics summaryPercentile calculatorZ-score calculatorProbability CalculatorBayes theorem calculatorCentral Limit Theorem CalculatorCoefficient of Variation CalculatorMargin of Error Calculator – ProportionClassification Accuracy and Confusion Matrix CalculatorAND Probability CalculatorBenford’s Law CalculatorBertrand’s Paradox CalculatorBonferroni Correction CalculatorChebyshev Theorem CalculatorClass Width CalculatorCoefficient of Determination CalculatorCohen's d CalculatorConditional Probability CalculatorEffect Size Calculator – Equal GroupsExponential Distribution CalculatorF-Statistic Calculator
Algebra
Exponent calculatorQuadratic equation solverLogarithm calculatorSlope calculatorSquare root calculatorRoot CalculatorCompleting the Square CalculatorAbsolute Value Equation CalculatorAge Word Problem Calculator – Three PeopleCoin Word Problem CalculatorArithmetic Sequence Calculator – nth Term and SumDivide Complex Numbers CalculatorDividing Exponents CalculatorDividing Radicals CalculatorExponential Function from Two Points Calculator
Everyday
GPA calculatorGrade calculatorFinal grade calculatorSteps to miles calculatorMiles to steps calculatorOne rep max calculatorCat Age CalculatorCBM calculatorConcrete Weight CalculatorGallons to PoundsLetter Grade to GPALumber Weight CalculatorMetal Weight CalculatorMoney Weight CalculatorPennies to DollarsProjector CalculatorScale CalculatorSpeedometer gear calculatorTopsoil calculatorVinyl fence calculatorVinyl siding calculatorWater weight calculatorWattage calculatorWatts to lux calculatorWheel offset calculatorWind chill calculatorBatting Average CalculatorCricket Bowling Average CalculatorCircle Skirt CalculatorCrop Factor Calculator – 35 mm EquivalentsPaper and photo sizesScreen size calculatorTip calculator
Engineering
Density calculatorVoltage drop calculatorOhm’s law calculatorWatts to amps calculatorWire gauge calculatorAmps to Watts CalculatorElastic Potential Energy CalculatorIdeal Gas Law CalculatorJoules to Volts CalculatorKinetic Energy CalculatorLumens to Watts CalculatorMomentum CalculatorParallel Resistor CalculatorPower Factor CalculatorPressure CalculatorVelocity CalculatorVoltage Divider CalculatorWavelength and Frequency CalculatorAcceleration CalculatorAmps to Volts CalculatorAngular Acceleration CalculatorAngular Velocity CalculatorCapacitance Calculator – Parallel PlatesCarburetor CFM CalculatorCentrifugal Force CalculatorCentripetal Force CalculatorCFM CalculatordB CalculatorDew Point CalculatorDisplacement CalculatorE = mc² CalculatorElectricity Cost CalculatorEngine Displacement CalculatorFlow Rate CalculatorForce CalculatorFrequency and Period CalculatorFriction CalculatorGear Ratio CalculatorGravitational Force CalculatorGravitational Potential Energy CalculatorHooke’s Law CalculatorImpulse CalculatorJoules to Watts CalculatorkVA CalculatorLED Resistor CalculatorLED Savings CalculatorMagnitude of Acceleration CalculatormAh to Wh CalculatorNet Force Calculator – Two ForcesNormal Force CalculatorGenerator Load and Motor Power CalculatorRLC Impedance Calculator – Series CircuitRMS Voltage CalculatorSeries Resistor CalculatorSpecific Heat CalculatorTerminal Velocity CalculatorTorque CalculatorVolts to Joules CalculatorWatts to Joules CalculatorWatts to Volts CalculatorWh to mAh CalculatorCompression Ratio CalculatorCompression Ratio to PSI – Ideal Gas CalculatorCross-Sectional Area CalculatorEngine Compression Ratio Calculator
Automotive
Health
Ideal weight calculatorBody fat calculatorCalorie calculatorCalories burned calculatorPregnancy calculatorSteps to calories calculatorTarget heart rate calculatorArmy Body Fat CalculatorBlood Alcohol CalculatorBody Surface Area CalculatorCarbohydrate CalculatorConception CalculatorFat Intake CalculatorLean Body Mass CalculatorMacro CalculatorPeriod CalculatorPregnancy Weight Gain CalculatorAdjusted Body Weight CalculatorFFMI CalculatorHarris–Benedict CalculatorIQ Percentile CalculatorNavy Body Fat CalculatorOvulation CalculatorProtein CalculatorRenal GFR CalculatorSleep CalculatorWaist-to-Height Ratio CalculatorWaist-to-Hip Ratio CalculatorWater Intake CalculatorWeight Gain CalculatorBMI calculatorBMR calculator
Geometry
Pythagorean theorem calculatorAspect ratio calculatorCircle calculatorRectangular prism surface areaRight triangle calculatorTank Volume CalculatorVolume calculatorAngle between two vectorsAngle of Depression CalculatorArc length calculatorArea calculatorCircumference to Diameter CalculatorCosecant CalculatorCotangent CalculatorCoterminal Angle CalculatorCross Product CalculatorCube CalculatorIsosceles Triangle CalculatorParallelogram Area CalculatorPerimeter Calculator – Rectangle, Square and CircleRegular Polygon CalculatorReference Angle CalculatorRhombus CalculatorSecant CalculatorTrapezoid CalculatorTriangle Calculator – Three Sides30-60-90 triangle calculator45-45-90 triangle calculatorTriangle Base or Height CalculatorTriangular Prism CalculatorUnit Vector CalculatorVector Calculator – Add and SubtractVector Magnitude CalculatorVector Projection CalculatorAnnulus Calculator – Ring Area and PerimeterConical frustum area calculatorSphere surface area calculatorTriangle SAS area calculatorCrescent area calculatorTriangle Area from Coordinates CalculatorBarrel Volume Calculator – Elliptical ProfileCapsule CalculatorCatenary Curve CalculatorCenter of a Circle CalculatorCenter of Ellipse CalculatorCentral Angle CalculatorChord Length CalculatorCircle Theorems CalculatorCircumcenter CalculatorCircumscribed Circle CalculatorCoin Rotation Paradox CalculatorComplementary Angles CalculatorCone Calculator – Volume and Surface AreaCycloid CalculatorPoint to Plane Distance CalculatorEllipse Circumference CalculatorEllipse Standard Form CalculatorEllipsoid Volume CalculatorEquation of a Circle CalculatorEquation of a Plane CalculatorEquation of a Sphere CalculatorEuler’s Polyhedron Formula CalculatorTriangle Exterior Angles Calculator
Science
Molarity calculatorHalf-Life CalculatorPPM to mg/L CalculatorDog Age CalculatorDog Pregnancy CalculatorDog Water Intake CalculatorGrass Seed Calculatormg/L to ppm CalculatorMolality calculatorMole calculatorMole fraction calculatorPercent yield calculatorpH calculatorPPM CalculatorSod CalculatorTheoretical yield calculator