Convert between units of length, weight, temperature, area and speed instantly. Metric and imperial. No signup, browser-based.
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Unit conversions appear everywhere — cooking recipes from American sites use cups and ounces while the rest of the world uses grams and milliliters. Engineering drawings switch between metric and imperial. Weather apps show Celsius or Fahrenheit depending on region. Travel apps show distances in miles or kilometers. A reliable unit converter eliminates manual calculation errors and saves time.
1 inch = 2.54 centimeters. 1 mile = 1.60934 kilometers. 1 kilogram = 2.20462 pounds. 1 gallon (US) = 3.78541 liters. Celsius to Fahrenheit: multiply by 9/5 then add 32. Fahrenheit to Celsius: subtract 32 then multiply by 5/9. These are the conversions most people look up — our tool handles them all instantly with full precision.