Free, instant converters for everyday life, science, electronics and computing.
Length, weight, temperature, cooking volumes and more for daily life.
Meters, feet, inches, miles, kilometers and more.
Kilograms, pounds, ounces, stones, tonnes and more.
Celsius, Fahrenheit, Kelvin and Rankine.
Square meters, acres, hectares, square feet and more.
Liters, gallons, cups, pints, tablespoons and more.
m/s, km/h, mph, knots, Mach and more.
Seconds, minutes, hours, days, weeks and years.
Degrees, radians, gradians, arcminutes and turns.
MPG (US and UK), km/L and L/100 km.
Pressure, energy, force, power, torque and other technical units.
Pascal, bar, psi, atm, torr, mmHg and more.
Joules, calories, kWh, BTU, eV and more.
Newtons, pound-force, kilogram-force, dynes and more.
Watts, kilowatts, horsepower and BTU per hour.
Newton-meters, pound-feet, kgf-m and more.
kg/m³, g/cm³, lb/ft³, lb/gal and more.
Hertz, kHz, MHz, GHz, RPM and rad/s.
m/s², g-force, ft/s² and more.
L/min, m³/h, gallons per minute, CFM and more.
Voltage, current and resistance for electronics and electrical work.
Storage sizes, network speeds and number systems.
No converter matches your search. Try a different unit name.
Whether you are a student, engineer, cook, traveler or developer, these converters give you the right number in one step. Type a value, choose a unit, and every equivalent unit updates instantly, using exact international conversion factors where they exist.
Everything is calculated in your browser as you type, with no page reloads.
Big touch targets, numeric keyboard and a layout that adapts from phone to desktop.
Copy any result, save all results as a text file, or share a link with your value filled in.
Show from 4 up to 15 significant digits depending on how exact you need to be.
Nothing you type is sent to a server. Your last conversion is remembered only in your browser.
Keyboard friendly, screen-reader labels and clear focus states on every control.
Yes. Converters use the exact international definitions where they exist (for example 1 inch = 25.4 mm and 1 lb = 0.45359237 kg) and show up to 15 significant digits on request. Results are calculated in your browser with standard double-precision numbers.
No conversion is sent to our servers. Each tool only remembers your last value and units in your own browser (local storage) so you can pick up where you left off; the Reset button clears it.
Yes. Every converter is designed mobile-first with large touch targets and a numeric keyboard, and scales up to tablets and desktops.
Use the "Share link" button on any converter to copy a link that opens with your value and units filled in.
Use the volume converter for cups, tablespoons and milliliters, the weight converter for ounces and grams, and the temperature converter for oven settings.