About QuickUnits
QuickUnits is a free online unit converter designed to make everyday measurements easier to understand. You can convert between metric, imperial and other common units in your browser without an account.
What you can convert
The calculator supports length, weight, temperature, area, volume, speed, time, digital storage, pressure and energy. Dedicated pages also include formulas and practical conversion charts.
How calculations work
Most unit pairs are converted using a shared reference unit and standard measurement factors. Temperature uses separate Celsius, Fahrenheit and Kelvin formulas because their scales have different starting points. Values are calculated directly in the browser.
Accuracy and rounding
QuickUnits uses established defined conversion factors where available, including 1 inch = 2.54 centimetres and 1 mile = 1.609344 kilometres. Displayed results are rounded for readability; very large, very small or precision-critical calculations may require specialist tools.
QuickUnits for Chrome
For quick conversions without leaving your current tab, use the free QuickUnits Chrome extension. It supports everyday measurement categories and can be used offline.
Free and simple
No sign-up is required. The basic unit converter does not send your entered measurements to a server for calculation. Learn more in our privacy policy.