Calculator library
Browse calculators for finance, maths, dates, statistics, health, education, and construction.
Browse calculators
80 toolsAge Calculator
Calculate an exact calendar age, total days, and time to the next birthday.
Open calculatorAppliance Electricity Cost Calculator
Estimate running and standby energy costs for an appliance over a chosen period.
Open calculatorBattery Runtime Calculator
Estimate constant-load runtime from battery capacity, usable energy, and conversion losses.
Open calculatorBMI Calculator
Calculate adult body mass index in metric or US customary units.
Open calculatorBoard Foot Calculator
Calculate lumber board feet and material cost for a batch of equal boards.
Open calculatorBreak-Even Calculator
Find the sales volume needed to cover fixed costs or reach a target operating profit.
Open calculatorCAGR Calculator
Find the annualized growth rate between a starting and ending value.
Open calculatorCalorie Calculator
Estimate adult resting energy and daily calorie needs from activity level.
Open calculatorCircle Calculator
Calculate a circle’s radius, diameter, circumference, and area from one known measurement.
Open calculatorCompound Interest Calculator
See how an initial deposit and regular savings could grow over time.
Open calculatorConcrete Calculator
Estimate concrete volume and bag quantities for a rectangular slab.
Open calculatorData Storage Converter
Convert bits and bytes using clearly separated decimal and binary storage prefixes.
Open calculatorDate Difference Calculator
Count calendar time, total days, weeks, and weekdays between two dates.
Open calculatorDebt-to-Income Calculator
Compare monthly debt payments with gross income before and after an additional loan payment.
Open calculatorDeck Board Calculator
Estimate board rows, stock lengths, and cutting allowance for a rectangular deck.
Open calculatorDiscount Calculator
Find sale price, savings, tax, and effective price reduction.
Open calculatorEffective Annual Rate Calculator
Convert between nominal and effective annual rates for a selected compounding frequency.
Open calculatorEMI Calculator
Calculate an equated monthly installment and reducing-balance loan cost.
Open calculatorEV Charging Calculator
Estimate EV charging time and energy cost between two battery charge levels.
Open calculatorFence Material Calculator
Count sections, posts, rails, and pickets for one straight fence run.
Open calculatorFertilizer Application Calculator
Convert a target nitrogen application into fertilizer weight and accompanying nutrients.
Open calculatorFixed Deposit Calculator
Estimate deposit maturity with reinvested interest or calculate simple interest payouts.
Open calculatorFraction Calculator
Add, subtract, multiply, or divide two fractions and reduce the result.
Open calculatorGCD and LCM Calculator
Find the greatest common divisor and least common multiple of two whole numbers.
Open calculatorGPA Calculator
Estimate a credit-weighted GPA on a common 4.0 plus/minus scale.
Open calculatorGrade Calculator
Calculate a course grade from points or weighted categories.
Open calculatorGrass Seed Calculator
Estimate seed weight and bags from lawn area and the product seeding rate.
Open calculatorGrout Calculator
Estimate grout mass from tile size, joint dimensions, and product density.
Open calculatorGST Calculator
Add GST to a base amount or extract it from a tax-inclusive price.
Open calculatorHeat Pump Cost Calculator
Estimate heat-pump electricity cost from delivered heat, COP, and resistance backup share.
Open calculatorImage Aspect Ratio Calculator
Calculate proportional image dimensions for fitting inside or filling a target frame.
Open calculatorInflation Calculator
Estimate future costs and purchasing power using an annual inflation assumption.
Open calculatorInvestment Fee Calculator
Compare how two annual fee rates affect the same investment over time.
Open calculatorInvestment Growth Calculator
Model annual contributions, returns, and inflation-adjusted value.
Open calculatorLength Converter
Convert distances between metric, international customary, and nautical units.
Open calculatorLoan Affordability Calculator
Calculate the loan amount supported by a monthly payment budget, rate, and term.
Open calculatorLoan Calculator
Estimate fixed loan payments, total interest, and the effect of extra payments.
Open calculatorLoan Comparison Calculator
Compare two fixed-rate loan offers by monthly payment and total interest plus upfront fees.
Open calculatorLumpsum Investment Calculator
Project one investment with no later contributions.
Open calculatorMean, Median & Mode Calculator
Calculate common measures of center and range for a list of numbers.
Open calculatorMortgage Calculator
Estimate principal, interest, taxes, insurance, HOA fees, and total housing payment.
Open calculatorMulch Calculator
Estimate mulch volume, bag count, and bagged versus bulk material cost.
Open calculatorPaint Calculator
Estimate wall paint from room dimensions, openings, coats, and product coverage.
Open calculatorPercentage Calculator
Find a percentage, compare two numbers, or calculate a change.
Open calculatorPercentage Difference Calculator
Compare two nonnegative values using their average as the percentage base.
Open calculatorPermutation and Combination Calculator
Count ordered arrangements and unordered selections of distinct items without replacement.
Open calculatorPhoto Storage Calculator
Estimate image storage and card capacity using a measured average file size.
Open calculatorPlant Spacing Calculator
Count planting positions in a rectangular grid with explicit edge margins.
Open calculatorPrint Bleed Calculator
Calculate artwork dimensions with bleed, safe-area dimensions, and raster pixel size.
Open calculatorPrint Size Calculator
Convert image pixels into print dimensions at a chosen pixels-per-inch value.
Open calculatorProbability Calculator
Calculate single-event or binomial probabilities, complements, and expected successes.
Open calculatorProfit Margin Calculator
Calculate profit, margin, markup, and cost share.
Open calculatorPythagorean Theorem Calculator
Find a missing right-triangle side and calculate its area, perimeter, and acute angles.
Open calculatorQuadratic Equation Calculator
Solve real-coefficient quadratic equations, including complex roots and linear cases.
Open calculatorRaised Bed Soil Calculator
Plan raised-bed fill volume and separate soil and compost bag quantities.
Open calculatorRatio Calculator
Simplify a two-part ratio and divide a total into proportional shares.
Open calculatorRecurring Deposit Calculator
Estimate maturity for monthly deposits using a quarterly-compounded annual rate.
Open calculatorRetirement Corpus Calculator
Estimate a retirement fund target from expenses, inflation, and a planned withdrawal period.
Open calculatorReverse Percentage Calculator
Find the original amount before a known percentage increase or decrease.
Open calculatorROI Calculator
Measure profit or loss against total cost basis.
Open calculatorSalary to Hourly Calculator
Convert gross pay between annual, monthly, weekly, and hourly amounts for your schedule.
Open calculatorSavings Calculator
Project savings from an initial balance, monthly deposits, and interest.
Open calculatorSavings Goal Calculator
Find the monthly contribution needed to reach a target amount by a chosen year.
Open calculatorSelling Price Calculator
Calculate a selling price that covers unit costs and selling fees at a target margin.
Open calculatorSimple Interest Calculator
Calculate interest earned only on the original principal.
Open calculatorSIP Calculator
Project the value of fixed monthly investments using a constant return.
Open calculatorSolar Energy Calculator
Estimate solar generation and energy value using a supplied solar-resource assumption.
Open calculatorSpeed Converter
Convert speeds between metres per second, kilometres per hour, miles per hour, feet per second, and knots.
Open calculatorSquare Footage Calculator
Calculate rectangle area, repeated quantities, waste allowance, and unit conversions.
Open calculatorStandard Deviation Calculator
Measure the spread of a dataset, with sample and population results.
Open calculatorStep-Up SIP Calculator
Model monthly investments that increase once a year, with a fixed SIP for comparison.
Open calculatorSWP Calculator
Model fixed monthly withdrawals and see whether a fund lasts through the chosen period.
Open calculatorTemperature Converter
Convert Celsius, Fahrenheit, and Kelvin temperatures or temperature differences.
Open calculatorTile Calculator
Estimate tiles and boxes from surface size, tile size, and waste allowance.
Open calculatorTime Duration Calculator
Find elapsed hours and minutes between two clock times.
Open calculatorTip Calculator
Calculate a pre-tax tip and split the total evenly.
Open calculatorVideo File Size Calculator
Estimate video storage from duration, average bitrate, audio, and overhead.
Open calculatorWallpaper Calculator
Estimate wallpaper rolls using full drops, trimming, and straight pattern repeats.
Open calculatorWeight Converter
Convert mass between kilograms, grams, pounds, ounces, stones, and metric tonnes.
Open calculatorWeighted Average Calculator
Find a weighted mean from values and their relative weights, counts, or quantities.
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