Fast conversions for everyday and technical units
Unit Converter is a free browser app for quick conversions across 17 useful categories and 115 measurement units. It combines everyday conversions with technical, energy and digital units in a clear multilingual interface.
Runs directly in modern browsers on Windows, macOS, Android, iPhone/iPad and other modern devices. On supported browsers and devices, it can also be installed as a web app (PWA). After the first successful load, the converter can reopen with its core functionality without an internet connection. Theme and language preferences are stored locally on your device. No Apps & Games account is required.
Enter a number, select the source and destination units, and the converted value is shown immediately. Both value fields can be edited, making it easy to calculate in either direction without rebuilding the conversion.
The app includes length, time, volume, area, mass, temperature, speed, energy, power, pressure, angle, frequency, fuel economy, force, torque, digital storage and data transfer rate conversions.
Use the app for kilometers and miles, kilograms and pounds, liters and gallons, square meters and acres, kilowatts and metric horsepower, bits and bytes, joules and kilowatt-hours, newtons, torque units and data transfer speeds.
Open the app, choose a category, select two units and enter a value in either field. You can change the interface language at any time, and the app will update the controls, descriptions and measurement unit names.
Apps & Games does not require an account to open Unit Converter. Conversion calculations run directly in the browser. Availability and appearance can vary slightly depending on the device, browser version and screen size. For information about analytics, advertising and privacy choices on this website, see the Privacy Policy.