Metric or imperial? Convert either way
Most of the world uses the metric system, but feet, pounds, Fahrenheit and US cups are still everywhere: in American recipes, UK road signs, flight altitudes, clothing sizes and product listings. These converters take care of the awkward math so you can follow a recipe, compare a product or plan a trip without guessing.
How the converters work
- Type a number in the From box and pick the units. The answer appears in the To box.
- You can also type in the To box and the conversion runs the other way.
- The table under each converter shows the same value in every unit, which is handy when you are not sure which unit you need.
Exact conversion factors
We use the official definitions, not rounded numbers. One inch is exactly 2.54 cm, one pound is exactly 0.45359237 kg and one US gallon is exactly 3.785411784 liters. Results are shown to a sensible number of digits so they are easy to read.