103 free calculators · 100% private

Your life in numbers,
solved in seconds.

A calm, precise home for everyday maths — finance, health, conversions and more. No sign-ups, no uploads, just clean answers as you type.

Browse by category

Six focused collections, 103 calculators in total.

FinanceLoans, EMI, interest, tax and money maths.27 HealthBMI, calories, macros and fitness numbers.10 MathScientific, geometry, percentages and stats.22 Date & TimeAge, date gaps, durations and countdowns.5 EducationGPA, CGPA, grades and marks percentage.4 ConversionLength, weight, area, speed and data units.9 DeveloperJSON, Base64, JWT, regex and generators.10 ConstructionConcrete, tiles, roofing and square footage.4 EngineeringOhm’s law, power, resistors and speed.5 AutomobileMileage, fuel cost and gas mileage.3 WeatherHeat index and wind chill ‘feels like’.2 FunLove score and dice roller, just for fun.2

Most popular

The calculators people reach for most.

See all

EMI CalculatorMonthly EMI, total interest and total payable on any loan.Finance SIP CalculatorFuture value of a monthly SIP investment.Finance BMI CalculatorBody Mass Index and healthy weight range.Health Percentage CalculatorPercentages, change and ‘X of Y’.Math Scientific CalculatorFull scientific calculator with functions.Math Age CalculatorYour exact age in years, months and days.Date & Time GST CalculatorAdd or remove GST and see net / gross.Finance Currency ConverterConvert currencies with editable rates.Finance Password GeneratorStrong random passwords.Developer Tip CalculatorSplit the bill and tip across people.Finance

All calculators

Everything, grouped by category.

Finance

27 calculators

EMI CalculatorMonthly EMI, total interest and total payable on any loan.Home Loan CalculatorEMI, interest and total cost for a home loan.Personal Loan CalculatorEMI and total cost of a personal loan.Car Loan CalculatorEMI and interest for a car / auto loan.Mortgage CalculatorMonthly mortgage payment with tax and insurance.Mortgage Payoff CalculatorSee how extra payments shorten your mortgage.Loan CalculatorFlexible loan EMI, interest and total repayment.SIP CalculatorFuture value of a monthly SIP investment.Lumpsum CalculatorGrowth of a one-time lumpsum investment.FD CalculatorMaturity amount and interest on a fixed deposit.RD CalculatorMaturity value of a recurring deposit.Compound InterestSee how your savings grow with compounding.Simple InterestSimple interest and the final amount.Savings Goal CalculatorReach a savings goal with monthly deposits.Investment CalculatorFuture value with regular contributions.ROI CalculatorReturn on investment and net gain.CAGR CalculatorCompound annual growth rate of an investment.GST CalculatorAdd or remove GST and see net / gross.VAT CalculatorAdd or remove VAT at any rate.Income Tax CalculatorEstimate income tax (India, new regime).Salary CalculatorConvert between hourly, monthly and annual pay.Take-Home Salary CalculatorNet in-hand salary after deductions.Discount CalculatorSale price and how much you save.Currency ConverterConvert currencies with editable rates.Budget CalculatorSplit income with the 50/30/20 rule.Tip CalculatorSplit the bill and tip across people.Unit Price CalculatorCompare products by price per unit.

Health

10 calculators

BMI CalculatorBody Mass Index and healthy weight range.Calorie CalculatorDaily calories to maintain, lose or gain weight.BMR CalculatorResting calories your body burns (BMR).TDEE CalculatorTotal daily energy expenditure.Body Fat CalculatorBody fat % via the U.S. Navy method.Ideal Weight CalculatorIdeal body weight for your height.Protein CalculatorDaily protein target for your goals.Macro CalculatorDaily protein, carb and fat split.Calories Burned CalculatorCalories burned by activity and time.Target Heart Rate CalculatorYour training heart-rate zones.

Math

22 calculators

Scientific CalculatorFull scientific calculator with functions.Basic CalculatorQuick everyday arithmetic.Percentage CalculatorPercentages, change and ‘X of Y’.Fraction CalculatorAdd, subtract, multiply and simplify fractions.Average CalculatorMean, median, mode and range.Ratio CalculatorSimplify and solve ratios.Area CalculatorArea of common 2D shapes.Volume CalculatorVolume of common 3D shapes.Circle CalculatorRadius, area and circumference.Triangle CalculatorArea, perimeter and sides of a triangle.Distance CalculatorDistance between two coordinates.Surface Area CalculatorSurface area of 3D shapes.Exponent CalculatorRaise a number to any power.Root CalculatorSquare, cube and nth roots.LCM CalculatorLeast common multiple of numbers.GCF / HCF CalculatorGreatest common factor of numbers.Factor CalculatorList all factors of a number.Rounding CalculatorRound to decimals or place values.Pythagorean Theorem CalculatorSolve a² + b² = c².Right Triangle CalculatorSides and angles of a right triangle.Quadratic Equation SolverSolve ax² + bx + c = 0.Standard Deviation CalculatorSD, variance and mean.

Date & Time

5 calculators

Age CalculatorYour exact age in years, months and days.Date CalculatorDays between dates, or add / subtract days.Time CalculatorAdd or subtract times and durations.Time Duration CalculatorDuration between two times.Day CounterDays until (or since) any date.

Education

4 calculators

GPA CalculatorGrade point average from your courses.Grade CalculatorWeighted grade and the score you need.CGPA CalculatorCumulative GPA across semesters.Marks Percentage CalculatorPercentage from marks obtained.

Conversion

9 calculators

Unit ConverterAll-in-one converter for many measurements.Length Convertermm, cm, m, km, inch, foot, mile.Weight Convertermg, g, kg, ounce, pound, stone.Area Converterm², ft², acre, hectare and more.Volume Converterlitre, ml, gallon, cup and more.Temperature ConverterCelsius, Fahrenheit and Kelvin.Speed Converterm/s, km/h, mph, knots.Data Storage Converterbytes, KB, MB, GB, TB.Time Converterseconds, minutes, hours, days.

Developer

10 calculators

JSON FormatterBeautify and minify JSON.JSON ValidatorValidate JSON and pinpoint errors.Password GeneratorStrong random passwords.Base64 Encode / DecodeEncode and decode Base64.URL Encode / DecodeEncode and decode URL components.UUID GeneratorGenerate v4 UUIDs.JWT DecoderDecode JWT header and payload.QR Code GeneratorMake a QR code from text or a URL.Timestamp ConverterUnix time ↔ human date.Regex TesterTest regular expressions live.

Construction

4 calculators

Concrete CalculatorConcrete volume and bags needed.Tile CalculatorTiles and boxes needed for an area.Roofing CalculatorRoof area and material estimate.Square Footage CalculatorArea in square feet or metres.

Engineering

5 calculators

Ohm's Law CalculatorSolve voltage, current, resistance and power.Electricity Cost CalculatorRunning cost of an appliance.Resistor Color Code CalculatorDecode resistor colour bands.Speed CalculatorSpeed, distance and time.Power CalculatorElectrical power from V, I and R.

Automobile

3 calculators

Mileage CalculatorFuel efficiency from distance and fuel.Fuel Cost CalculatorEstimate the fuel cost of a trip.Gas Mileage CalculatorMPG or km-per-litre for a trip.

Weather

2 calculators

Heat Index Calculator‘Feels like’ temperature in heat and humidity.Wind Chill Calculator‘Feels like’ temperature in cold and wind.

Fun

2 calculators

Love CalculatorA playful compatibility score.Dice RollerRoll one or more dice.

100% privateEvery calculation runs on your device. Nothing is ever uploaded.

Instant resultsAnswers update live as you type — no waiting, no page reloads.

Free, no sign-upEvery calculator is free forever. No account, no paywall.

Works offlineOnce loaded, they keep working even without a connection.

Loading page

Your life in numbers,solved in seconds.

Browse by category

Most popular

All calculators

Finance

Health

Math

Date & Time

Education

Conversion

Developer

Construction

Engineering

Automobile

Weather

Fun

Your life in numbers,solved in seconds.

Browse by category

Most popular

All calculators

Finance

Health

Math

Date & Time

Education

Conversion

Developer

Construction

Engineering

Automobile

Weather

Fun

Your life in numbers,
solved in seconds.

Your life in numbers,
solved in seconds.