Common conversions
Convert any unit instantly
Switch between metric and imperial for length, weight, temperature, volume, area, speed, digital storage and time. Enter a value and the conversion appears immediately, with high precision and a common-conversions table for quick reference. Everything runs in your browser.
Frequently asked questions
Which units can I convert?
Length, weight/mass, temperature, volume, area, speed, digital storage and time — switching freely between metric and imperial units.
How accurate are the conversions?
They use exact internationally-defined conversion factors (for example 1 inch = 2.54 cm), rounded sensibly for display.
Can it convert Celsius to Fahrenheit?
Yes — choose the Temperature category and pick Celsius, Fahrenheit or Kelvin on either side.