Unit Converter
Convert length, weight, temperature, area, speed and volume.
Convert instantly across six measurement families with full precision - metric to imperial and back.
Millimetre1,000
Centimetre100
Kilometre0.001
Inch39.370079
Foot3.28084
Yard1.093613
Mile0.000621
Nautical mile0.00054
How the unit converter works
- 1Choose a measurement category.
- 2Enter a value and select the source unit.
- 3Pick the target unit — conversion is instant.
- 4Swap the units to verify with a round trip.
Frequently asked questions about the unit converter
Which categories are supported?+
Length, weight, temperature, volume, area and speed, each with the common metric and imperial units used in everyday life.
How accurate are the conversions?+
They use official conversion factors, such as exactly 2.54 cm per inch and 0.45359237 kg per pound, and display up to six significant decimals.
Is this tool free to use?+
Yes, completely. There is no account, no trial, no watermark and no daily limit. Data Wave Cloud is funded by unobtrusive advertising so the tools stay free permanently.