UMARIX Unit Converter

Convert everyday measurements quickly and correctly, without signup, downloads, or uploads. Whether you are checking a recipe in cups, a road distance in miles, a room size in square feet, or a file size in gigabytes, this site gives you a live answer in your browser and shows the same value in every related unit, so you can spot a mistake before it matters.

Unit confusion causes real problems: a recipe fails when fluid ounces are mistaken for weight ounces, a shipment costs more when kilograms are entered as pounds, and a traveler misreads a speed limit when miles per hour are mistaken for kilometers per hour. Each converter on this site uses standard, exact factors where they exist, such as 1 mile equals 1609.344 meters and 1 pound equals 0.45359237 kilograms, and explains the common traps for that unit, including the difference between US and imperial gallons and the difference between 1024-based and 1000-based data sizes.

How it works

Choose a converter below.
Type your value, pick the starting unit, and pick the unit you want.
Read the live result, check the full table of every unit, swap the direction if needed, or copy the result into your document.

All calculations run on your device. Nothing you type is sent to a server by these tools, and no account is required at any step.

Length Converter

Convert length between meters, kilometers, centimeters, millimeters, miles, yards, feet, and inches.

Weight Converter

Convert weight between kilograms, grams, pounds, and ounces with exact standard factors.

Temperature Converter

Convert temperature between Celsius, Fahrenheit, and Kelvin using the correct formulas.

Speed Converter

Convert speed between meters per second, kilometers per hour, miles per hour, knots, and feet per second.

Area Converter

Convert area between square meters, square kilometers, hectares, acres, square feet, square yards, and square miles.

Volume Converter

Convert volume between liters, milliliters, cubic meters, US gallons, quarts, pints, cups, and fluid ounces.

Pressure Converter

Convert pressure between pascals, kilopascals, bar, psi, atmospheres, and millimeters of mercury.

Energy Converter

Convert energy between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTUs.

Data Storage Converter

Convert data storage between bytes, kilobytes, megabytes, gigabytes, and terabytes using 1024-based units, with the 1000-based decimal note explained.

Frequently asked questions

Are these converters free?

Yes. Every converter on this site is free to use in your browser, with no signup.

Do the converters work offline after the page loads?

The calculation code runs in your browser, so once the page has loaded you can convert values without sending each value to a server.

Which converter should I start with?

Start with the unit you already have: length for distances, weight for mass, temperature for weather and cooking, and data storage for files and drives.