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Free Online Calculators for Everyday Math & Money

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Age Calculator

Calculate exact age in years, months, days, and total elapsed days.

Everyday

Percentage Calculator

Calculate percentages, proportions, and percentage change with a clear formula breakdown.

Math

Discount Calculator

Calculate a sale price, savings, and optional additional discount.

Finance

Date Difference Calculator

Find the calendar and total-day difference between two dates.

Everyday

Unit Converter

Convert length and weight between metric and imperial units instantly.

Conversions

Percentage Increase Calculator

Calculate a value after a percentage increase and see the exact increase amount.

Math

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Everyday calculators

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MathPercentages, fractions, averages and everyday arithmetic.26 toolsFinanceLoans, interest, savings, tax and business numbers.16 toolsHealth & FitnessBody measurements, calories, pregnancy and fitness targets.10 toolsConversionsLength, weight, temperature, volume and more.8 toolsEverydayDates, time, travel and other daily helpers.15 toolsCareerCompare pay, benefits, work time, commuting, and job offers.13 toolsHomeMaterials, project quantities, room sizing and home planning estimates.10 toolsDeveloper ToolsBrowser-based formatters, encoders, validators and developer utilities.14 toolsText ToolsPrivate browser-based counters, cleaners, converters and comparison tools.10 toolsPersonal FinanceSIP and investment growth, inflation and net worth calculators.7 toolsTaxUS and India income tax and take-home pay estimators, from official published rates.7 toolsStatisticsMean, variance, probability, weighted mean, median, standard error, confidence intervals, z scores, regression, correlation and uncertainty.10 tools

Professional and industry tools

Engineering, project management, supply chain, finance, workforce, energy and science calculators.