Foot (ft)
A foot (plural: feet or foot; symbol or abbreviation: ft or, sometimes, ′ – a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. Its size can vary from system to system, but in each is around a quarter to a third of a metre. The most commonly used foot today is the international foot. There are 3 feet in a yard and 12 inches in a foot.
Metric
- Kilometre (km)3.05×10⁻⁴
- Metre (m)0.3
- Decimetre (dm)3.05
- Centimetre (cm)30.48
- Millimetre (mm)304.8
- Micrometre (µm)304,800
- Nanometre (nm)304,800,000
- Angstrom (Å)3.05×10⁹
Nautical
- Nautical mile1.65×10⁻⁴
- Fathom0.17
Astronomical
- Parsec (pc)9.88×10⁻¹⁸
- Light year3.22×10⁻¹⁷
- Astronomical unit (AE)2.04×10⁻¹²
- Light minute1.69×10⁻¹¹
- Light second1.02×10⁻⁹