Unit converter

Convert length, weight, temperature, area, volume, speed, time, data size, pressure, energy, power, angle and fuel economy. Everything runs in your browser; nothing is uploaded.

1 ft =0.3048 m
1 ft in every length unit
Millimetre304.8 mm
Centimetre30.48 cm
Metre0.3048 m
Kilometre0.0003048 km
Inch12 in
Foot1 ft
Yard0.3333333333 yd
Mile0.0001893939 mi
Nautical mile0.0001645788 nmi
Micrometre304,800 µm
Nanometre304,800,000 nm

Accurate by definition

Conversions use the exact legal definitions where they exist — 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 US gallon = 3.785411784 L — so results are not rounded twice. The table under the result shows your value in every unit of the category.

Data sizes: MB vs MiB

Storage makers use decimal units (1 MB = 1,000,000 bytes) while operating systems often show binary units (1 MiB = 1,048,576 bytes). That is why a “1 TB” disk shows about 931 GiB.

Link to a conversion with ?c=weight&from=kg&to=lb&v=70.

Questions

Which gallon is used?

Both are listed: the US gallon (3.785 L) and the UK imperial gallon (4.546 L). Miles per gallon has both versions too.

How long is a month or a year here?

Averages: a year of 365.2425 days (Gregorian calendar) and a month of one twelfth of that, 30.44 days.

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