Unit converter
Convert length, mass, temperature, area, volume and speed.
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How we handle your data →How to use this tool
- Choose length, mass, temperature, area, volume or speed.
- Select source and destination units and enter a value without thousands separators.
- Check the output symbol and the gallon or ounce definition when relevant.
An example you can verify
Express a measurement in another unit of the same quantity.
Example input
Value: 1 From: in To: mm
Expected result
25.4 mm.
Choose the quantity before units. US and UK gallons are not the same volume.
Settings and limits
Choose a quantity, units and value. Inches, feet, miles and pounds use international definitions; US and UK gallons are separate. Results are rounded to 13 significant digits.
Frequently asked questions
Which ounce is used?
The avoirdupois mass ounce: 28.349523125 grams. It is not a troy ounce or a fluid ounce.