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Math & Scientific
65 calculators
Basic CalculatorcalculatorRandom Number Generatorrandom number generatorPercentage Calculatorpercentage calculatorScientific Calculatorscientific calculatorFraction Calculatorfraction calculatorIntegral Calculatorintegral calculatorGraphing Calculatorgraphing calculatorPercentage Difference Calculatorpercentage difference calculatorPercentage Increase Calculatorpercentage increase calculatorAlgebra Calculatoralgebra calculatorDerivative Calculatorderivative calculatorStandard Deviation Calculatorstandard deviation calculatorPercent Change Calculatorpercentage change calculatorAverage Calculatoraverage calculatorMatrix Calculatormatrix calculatorRatio Calculatorratio calculatorLimit Calculatorlimit calculatorLogarithm Calculatorlogarithmic tableQuadratic Formula Calculatorquadratic formula calculatorEquation Solverequation solverInverse Matrix Calculatorinverse matrix calculatorRounding Calculatorrounding calculatorSystem of Equations Calculatorsystem of equations calculatorTrigonometry Calculatortrigonometry calculatorLCM Calculatorlcm calculatorMixed Number Calculatormixed number calculatorPercentage Decrease Calculatorcalculate decrease percentageProbability Calculatorprobability calculatorZ Score Calculatorz score calculatorBinary Calculatorbinary calculatorExponent Calculatorexponent calculatorModulo Calculatormodulo calculatorScientific Notation Calculatorscientific notation calculatorGCF Calculatorgcf calculatorHex Calculatorhex calculatorNormal Distribution Calculatornormal distribution calculatorProportion Calculatorproportion calculatorSignificant Figures Calculatorsignificant figures calculatorVariance Calculatorvariance to standard deviationMean Median Mode Calculatormean median mode calculatorDecimal to Fraction Calculatordecimal to fraction calculatorLinear Equation Calculatorlinear equation calculatorRoot Calculatorroot calculatorComplex Number Calculatorcomplex number calculatorFraction to Decimal Calculatorfraction to decimal calculatorPrime Factorization Calculatorcalculator for prime factorizationArithmetic Sequence Calculatorarithmetic sequence calculatorGeometric Sequence Calculatorgeometric sequence calculatorFibonacci Calculatorfibonacci calculatorBitwise Calculatorbitwise calculatorRoman Numeral Converterroman numeral generatorPrime Number Calculatorprime number calculatorCombination Calculatorpermutation and combination solverPermutation Calculatorpermutation and combination solverOctal Calculatoroctal calculatorSample Size Calculatoronline sample size calculatorUnit Circle Calculatorunit circle calculatorNumber Base Converterlottery number generator based on previous resultsConfidence Interval Calculatorconfidence interval calculator for standard deviationDeterminant Calculatormatrix determinant problemsSin Cos Tan Calculatorsin cos tan fraction calculatorCoin Flip Simulatorcoin flip simulatorDice Rollerdice rollerPercent Error Calculatorpercent error calculatorRandom Name Pickerrandom name picker
Finance & Investment
50 calculators
Mortgage Calculatormortgage calculatorEMI Calculatoremi calculatorSIP Calculatorsip calculatorCompound Interest Calculatorcompound interest calculatorLoan Calculatorloan calculatorCar Loan Calculatorcar loan calculatorHome Loan Calculatorhome loan calculatorInvestment Calculatorinvestment calculatorFD Calculatorfd calculatorPersonal Loan Calculatorpersonal loan calculatorPPF Calculatorppf calculatorRetirement Calculatorretirement calculatorSWP Calculatorswp calculatorMutual Fund Returns Calculatormutual fund calculatorRD Calculatorrd calculatorInterest Rate Calculatorinterest rate calculatorCAGR Calculatorcagr calculatorLumpsum Calculatorlumpsum calculatorSavings Calculatorsavings calculatorSimple Interest Calculatorsimple interest calculatorAnnuity Calculatorannuity calculatorPension Calculatorpension calculatorCurrency Convertercurrency converter calculatorEducation Loan Calculatoreducation loan calculatorFuture Value Calculatorfuture value calculatorROI Calculatorroi calculatorDividend Calculatorcalculator dividendStock Average Calculatorstock average calculatorEPF Calculatorepf calculatorHome Affordability Calculatorhome affordability calculatorLoan Amortization Calculatorloan amortization calculatorBudget Calculatorbudget calculatorBusiness Loan Calculatorbusiness loan calculatorCredit Card Payoff Calculatorcredit card payoff calculatorDebt to Income Ratio Calculatordebt to income ratio calculatorIRR Calculatorirr calculatorNet Worth Calculatornet worth calculatorPresent Value Calculatorpresent value calculatorMortgage Refinance Calculatorrefinance mortgage rates calculatorNPS Calculatornps scheme calculatorDebt Payoff Calculatordebt payoff calculatorRent vs Buy Calculatorrent vs buy calculatorInflation Calculatorsip calculator with inflationLoan Eligibility Calculatorloan eligibility calculatorXIRR Calculatorxirr calculatorSavings Goal Calculatorsavings goal calculatorExpense Calculatorexpense calculatorCrypto Profit Calculatorcrypto profit calculatorDebt Avalanche Calculatordebt avalanche calculatorDebt Snowball Calculatordebt snowball calculator
Unit Converters
33 calculators
CM to Inches Convertercm to inchesInches to CM Converterinch to cmKG to LBS Converterkg to lbsLBS to KG Converterlbs to kgMM to Inches Convertermm to inchesCelsius to Fahrenheit Convertercelsius to fahrenheitFeet to CM Convertercms to feetFahrenheit to Celsius Converterfahrenheit to celsiusGrams to Ounces Convertergrams to ouncesMeters to Feet Convertersq meters to square feetOunces to Grams Convertergrams to ouncesUnit Converterunit converterAngle Converterfind area of rectanglePower Converterkilowatt to horsepowerDensity Converterdensity formulaWeight Converterweight converterLength Converterlength converterArea Converterarea converterCups to Grams Converter200 grams into cupsTemperature Convertertemperature converterFuel Efficiency Converterfuel efficiency calculatorGallons to Liters Converter50 liters to gallonsLiters to Gallons Converter50 liters to gallonsTorque Convertertorque calculatorSpeed Converterspeed converterEnergy Converterenergy converterForce Converterarmed forces pension calculatorPressure Converterpressure converterVolume Convertervolume converterData Storage Converterdata storage converterBandwidth Converterwebsite bandwidth calculatorCooking Unit Convertercooking unit converterTablespoons to Cups Convertertablespoons to cups
Health & Fitness
28 calculators
BMI Calculatorbmi calculatorCalorie Calculatorcalorie calculatorTDEE Calculatortdee calculatorOvulation Calculatorovulation calculatorBMR Calculatorbmr calculatorBody Fat Calculatorbody fat calculatorMacro Calculatormacro calculatorPeriod Calculatorlast menstrual periodPregnancy Due Date Calculatorpregnancy due date calculatorProtein Calculatorprotein calculatorGestational Age Calculatorgestational age calculatorRunning Pace Calculatorrunning pace calculatorIdeal Weight Calculatorideal weight calculatorMax Heart Rate Calculatormax heart rate calculatorWater Intake Calculatorwater intake calculatorFertility Calculatorfertility calculatorHeart Rate Zone Calculatorheart rate zone calculatorLean Body Mass Calculatorlean body mass calculatorSteps to Calories Calculatorsteps to calories calculatorTarget Heart Rate Calculatortarget heart rate calculatorCalories Burned Calculatorcalories burned walking calculatorHeart Rate Calculatorheart rate calculatorSleep Calculatorsleep efficiency calculatorWaist to Height Ratio Calculatorwaist to height ratio body fat percentageBlood Alcohol Calculatorblood alcohol calculatorMedication Dosage Calculatormedication dosage calculatorSleep Cycle Calculatorsleep cycle calculatorWaist to Hip Ratio Calculatorwaist to hip ratio calculator
Education & Student
26 calculators
Grade Calculatorcentigrade to fGPA Calculatorgpa calculatorPH Calculatordesmos graphCGPA Calculatorcgpa calculatorCGPA to Percentage Calculatorcgpa to percentage calculatorMarks Percentage Calculatormarks percentage calculatorPercentage to CGPA Calculatorpercentage to cgpa calculatorSpeed Distance Time Calculatordistance formula speed timeDilution Calculatordilution calculatorOhms Law Calculatorohms law calculatorDensity Calculatordensity calculatorHalf Life Calculatorhalf life calculatorAttendance Calculatorattendance percentage calculatorExam Percentage Calculatorexam percentage calculatorForce Calculatorarmed forces pension calculatorProjectile Motion Calculatorprojectile motion calculatorPhysics Calculatorconversion of units in physicsMolarity Calculatorsigma molarity calculatorKinetic Energy Calculatorkinetic energy into electricityAcceleration Calculatormortgage acceleration calculatorFinal Grade Calculatorfinal grade calculatorMolar Mass Calculatormolar mass calculatorSemester Grade Calculatorsemester grade calculatorStudy Time Calculatorstudy time calculatorWeighted Grade Calculatorweighted grade calculatorWork Power Calculatorwork power calculator
India & Hindi Calculators
26 calculators
Income Tax Calculator Indiaincome tax calculator indiaSalary Calculator Indiacalculate salary tax indiaHome Loan EMI Calculator Indiaindia home loan emi calculatorSIP Calculator Indiasip calculator indiaGST Calculator Indiagst calculator indiaFD Calculator Indiafd calculator indiaAcre to Bigha Calculatoracre to bigha calculatorBigha to Acre Calculatorbigha to acre calculatorLoan EMI Calculator Indialoan emi calculator indiaCar Loan EMI Calculator Indiaemi calculator for car loan in indiaPersonal Loan EMI Calculator Indiabank of india personal loan emi calculatorRD Calculator Indiard calculator indiaAge Calculator Hindiage calculator hindiPPF Calculator Indiabank of india ppf calculatorGold Loan Calculator Indiagold loan calculator indiaHRA Calculator Indiahra calculation in indiaTDS Calculator Indiatds calculator indiaBMI Calculator Hindibmi calculator hindiPercentage Calculator Hindipercentage calculator hindiEMI Calculator Hindiemi calculator hindiCGPA to Percentage Indiacgpa to percentage calculator indiaEPF Calculator Indiaepf calculator indiaGratuity Calculator Indiagratuity calculator indiaLand Area Converter Indialand area converter indiaNPS Calculator Indianps calculator indiaPercentage to CGPA Indiapercentage to cgpa calculator india
Construction & Real Estate
24 calculators
Concrete Calculatorconcrete calculatorAcreage Calculatoracreage calculatorGravel Calculatorgravel calculatorMulch Calculatormulch calculatorPaint Calculatorpaint calculatorRoof Pitch Calculatorroof pitch calculatorProperty Tax Calculatorproperty tax calculatorTile Calculatortile calculatorAsphalt Calculatorasphalt calculatorBrick Calculatorbrick calculatorSoil Calculatorsoil calculatorConcrete Bags Calculatorconcrete calculator bagsCement Calculatorcement calculatorLand Area Calculatorland area calculatorRoofing Calculatorroofing calculatorFlooring Calculatorflooring calculatorSquare Feet to Acres Calculatorconvert acres to square feetRebar Calculatorcalculating rebarCarpet Calculatorcarpet calculatorDeck Calculatordeck stain estimatorFence Calculatorstain calculator fenceWallpaper Calculatorwallpaper removal cost calculatorDrywall Calculatordrywall primer calculatorLumber Calculatorlumber liquidators estimate
Geometry & Shapes
24 calculators
Triangle Calculatortriangle calculatorVolume Calculatorvolume calculatorArea Calculatorarea calculatorCone Calculatorcone volume formulaCube Calculatorsurface area of cubeRight Triangle Calculatorright triangle calculatorSlope Calculatorslope calculatorPythagorean Theorem Calculatorpythagorean theorem calculatorPrism Calculatorsurface area of the triangular prismPyramid Calculatorpyramid volume formulaSurface Area Calculatorsurface area calculatorCircle Calculatorcircle calculatorMidpoint Calculatormidpoint calculatorDistance Between Points Calculatordriving distance between 2 pointsSquare Calculatorsquare calculatorPerimeter Calculatorperimeter calculatorCylinder Calculatorcylinder calculatorEllipse Calculatorarea of ellipse formulaTrapezoid Calculatortrapezoid calculatorSphere Calculatorsphere calculatorParallelogram Calculatorparallelogram calculatorRectangle Calculatorrectangle calculatorPolygon Calculatorpolygon calculatorCoordinate Geometry Calculatorcoordinate geometry calculator
Tax, Salary & Business
23 calculators
Salary Calculatorsalary calculatorIncome Tax Calculatorincome tax calculatorTip Calculatortip calculatorTake Home Pay Calculatortake home pay calculatorGST Calculatorgst calculatorVAT Calculatorvat calculatorTDS Calculatoronline tds paymentDiscount Calculatordiscount calculatorSales Tax Calculatorsales tax calculatorGratuity Calculatorgratuity calculationHRA Calculatorhra calculationHourly to Salary Calculatorhourly to salary calculatorProfit Margin Calculatorprofit margin calculatorMarkup Calculatormarkup calculatorOvertime Pay Calculatorovertime calculatorDepreciation Calculatordepreciation calculatorCommission Calculatorcommission calculatorBreak Even Calculatorbreak even calculatorProfit and Loss Calculatorprofit and loss calculatorMarketing ROI Calculatormarketing roi calculatorInvoice Total Calculatorinvoice due date calculatorFreelance Rate Calculatorfreelance hourly rate calculatorShipping Cost Calculatorshipping cost calculator
Travel, Auto & Lifestyle
21 calculators
Love Calculatorlove calculatorFuel Cost Calculatorfuel cost calculatorMileage Calculatormileage calculatorAspect Ratio Calculatoraspect ratio calculatorDog Age Calculatordog age calculatorDownload Time Calculatordownload calculator timeCarbon Footprint Calculatorcarbon footprint calculatorTrip Cost Calculatorestimated gas cost for tripGas Mileage Calculatorgas mileage calculatorLottery Number Generatorlottery number generatorMusic BPM Calculatorheart bpm calculatorCat Age Calculatorcat age calculatorScreen Size Calculatorscreen size calculatorTV Size Calculatorcalculate tv sizeTire Size Calculatordiscount tire size calculatorCycling Speed Calculatorcycling speed calculatorPassword Strength Calculatorpassword strength calculatorNumerology Calculatornumerology death date calculatorBike Gear Calculatorbike gear calculatorPixel Density Calculatorpixel density calculatorRecipe Scaling Calculatorrecipe scaling calculator
Date & Time
19 calculators
Age Calculatorage calculatorDate Calculatordate calculatorTime Calculatortime calculatorDays Calculatordays calculatorHours Calculatorhours calculatorTime Duration Calculatortime duration calculatorTime Card Calculatortime card calculatorBirthday Calculatorbirthday day calculatorBusiness Days Calculatorbusiness days calculatorWorking Days Calculatorworking days calculatorDate Difference Calculatordate difference calculatorTime Zone Convertertime zone calculatorDays Until Calculatordays until calculatorUnix Timestamp Converterunix timestamp converterAdd Days to Date Calculatordate calculator add daysHoliday Calculatorholiday pay calculatorCountdown Calculatorcountdown calculatorWeek Number Calculatornumber of weeks calculatorLeap Year Calculatorhow is leap year calculated
Developer & Web
15 calculators
Password Entropy Calculatorpassword entropy calculatorColor Converterrandom hex color generatorAPI Response Time Calculatorapi response time calculatorBase64 Encoder Decoderbase64 encoder decoderCIDR Calculatorcidr calculatorCode Complexity Calculatorcode complexity calculatorHEX to RGB Converterhex to rgb converterHash Generatorhash generatorIP Subnet Calculatorsubnet calculatorJSON Size Calculatorjson size calculatorMD5 Generatormd5 generatorRGB to HEX Converterrgb to hex converterRegex Testerregex testerSHA256 Generatorsha256 generatorURL Encoder Decoderurl encoder decoder
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Calculations happen in your browser using JavaScript. The numbers you enter — your salary, weight, loan balance, test scores — never travel to our server.
One purpose per page
Every page does one thing well. No pop-ups asking you to sign up. No newsletter modals. No “read more” paywalls. Just the calculator.
Honest about limits
Some calculators (medication dosing, tax filings, blood alcohol) are estimates only. We say so loudly on those pages. We won't pretend a JavaScript tool replaces a doctor, accountant, or attorney.
Same family
Built by the same small team behind imgtoolsbase (191 image tools) and pdftoolsbase (161 PDF tools). Same philosophy: client-side, free, no nonsense.
Common questions
Are these calculators really free?
Yes. Every one of the 354 calculators is free. No signup, no paywall, no usage limit, no “premium tier”.
Where does my data go?
Nowhere. All math happens in your browser. The values you type are not sent to our server. We use Google AdSense and Google Analytics for ad serving and aggregate traffic stats (more in our privacy policy).
How accurate are the results?
The formulas are standard and verifiable. For high-stakes decisions — medical, legal, tax filings, large financial moves — always confirm with the appropriate professional or authority. Several calculators are marked as estimates only.
Why don't you ask me to sign up?
Because calculators should be quick. We optimise for time-to-answer, not retention metrics.
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