Every Converter You Need — In One Place

Fast, free and accurate unit converters for length, weight, currency, temperature, data storage and much more.

All Converters

Convert degrees, radians and gradians instantly.

Convert square meters, acres, hectares, square feet and more.

Convert between major world currencies.

Convert bytes, kilobytes, megabytes, gigabytes and terabytes.

Convert joules, calories, kilowatt-hours and BTU.

Convert between MPG, km/L and L/100km.

Convert meters, kilometers, miles, feet, inches, yards and more — instantly and accurately.

Convert between binary, decimal, octal and hexadecimal.

Convert watts, kilowatts, horsepower and BTU per hour.

Convert pascal, bar, psi, atm and torr in one click.

Convert km/h, mph, m/s and knots quickly and accurately.

Convert Celsius, Fahrenheit and Kelvin instantly.

Switch text between UPPERCASE, lowercase, Title Case and more.

Convert seconds, minutes, hours, days, weeks and years.

Convert liters, gallons, milliliters, cups, cubic meters and more.

Convert kilograms, grams, pounds, ounces, tonnes and stones with precision.

All conversions happen instantly in your browser as you type — no page reloads, no waiting.

Every converter uses precise, internationally recognized conversion factors and formulas.

Your inputs are never stored or sent anywhere — all calculations run locally in your browser.

Fully responsive design that works great on mobile, tablet and desktop.