Tools that simplify everyday life

Free online
calculators

A clean set of calculators and online tools for everyday tasks — fast, simple, and always available when you need them.

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Categories

Areas, ratios, averages, percentages, geometry.

Ages, differences, add/subtract, converters.

Birthdays, holidays, custom deadlines — live.

BMI, TDEE, body ratios, calorie targets.

CPM, discounts, tips, and everyday money math.

Square footage, materials, building projects.

Sizing, conversions, and more.

Recently added

Aug 1Construction

Pool Calculator

Find how much water your swimming pool holds. Enter the dimensions of a rectangular, round, or oval pool along with the shallow and deep end depths — the calculator returns the volume in gallons, liters, cubic meters, and cubic feet, plus surface area and water weight.

Pool Salt Calculator

Work out how many pounds or kilograms of pool salt to add to reach the level your salt chlorine generator needs. Enter your pool volume, the current salt reading, and your target — the calculator also tells you how many bags to buy, and what to do when the salt level is already too high.

Jul 31Date & Time

Birth Year Calculator

Find the year someone was born from their age and a reference year. Because age alone doesn't say whether the birthday has happened yet, the calculator shows both possible birth years — or a single year once you set the birthday status.

Jul 31Construction

Feet and Inches Calculator

Add, subtract, multiply, or divide two measurements in feet and inches — with fraction input, selectable inch precision, and instant conversions to decimal feet, total inches, and metric.

Jul 31Date & Time

Time Zone Calculator

Convert a date and time from one time zone to another. Pick a date, enter the time in 12- or 24-hour format, choose the From and To zones, and see the matching local time, day of the week, and UTC offset — with daylight saving handled automatically.

Rounding Calculator

Round any number to a chosen number of decimal places using six rounding methods — with a clear, step-by-step explanation of the result.

Popular tools

Percentage Calculator

Calculate percentages instantly — find what percent of a number is, determine what percentage one value is of another, or find the percentage change between two numbers.

Calculate the right tip for any bill in seconds — see common tip amounts at a glance, or split the total evenly across your group.

Calculate your Body Mass Index (BMI) — a widely used screening tool for body weight relative to height. Works in metric (cm / kg) and imperial (ft·in / lbs).

Discount Calculator

Calculate the final price after a percentage or fixed discount — with optional tax. See exactly how much you save in seconds.

Date Calculator

Find the exact number of days, weeks, months, and years between any two dates — calendar-aware with full leap-year support.

Speed Calculator

Calculate speed, distance, or time. Enter any two values and the third is computed instantly. Supports metric, imperial, and nautical units.

Christmas Countdown

Live countdown to Christmas — find out exactly how many days, hours, minutes, and seconds remain until December 25.

Calculate your exact age or the interval between any two dates — shown in years, months, weeks, days, hours, minutes, and seconds.

Birthday Countdown Calculator

Find out exactly how many days, hours, minutes, and seconds remain until your next birthday — with a live countdown that updates every second.

Everyday calculators
and tools

A collection of practical online tools built to save time every day.

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No accounts

Nothing to sign up for. Open the page, type, get your answer. We don't want your email.

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Calculations are private

Calculations stay on your device. We don't see them, store them, or sell them.

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72+ tools

A growing collection of single-purpose calculators — from percentages and ratios to age, distance, and countdowns.

About EasyCalc

EasyCalc is a collection of simple online calculators and everyday tools designed to be fast, practical, and easy to use. Each tool focuses on doing one thing well — whether it's percentages, conversions, dates, finance, or quick daily calculations.

We believe useful tools should open instantly and work without distractions. No unnecessary complexity, no forced sign-ups, no clutter — just straightforward tools that help you get an answer and move on with your day.

If you have a calculator you'd like to see added, or a measurement system we missed, we'd love to hear from you.