Metric ↔ imperial, without the guesswork
Convert length, weight, volume, area, speed, and temperature between all the common metric and imperial units. Pick a category, enter a value, and you get the specific conversion you asked for plus a full table of that value in every other unit — useful for cooking, travel, DIY, shipping, and schoolwork.
Worked examples
A 5 km run is about 3.11 miles. A 180 cm person is about 5 ft 10.9 in. A 350 °F oven is about 177 °C. A 20 lb suitcase is about 9.07 kg — comfortably under a 23 kg airline limit.
How the math works
Every unit is defined by an exact factor to a base unit (meters, kilograms, liters, square meters, or meters per second). Converting goes through the base: value × from-factor ÷ to-factor. Temperature is the exception — it needs an offset, which the calculator handles automatically.