Foot ft
About the Foot
The international foot is 12 inches, exactly 0.3048 metres. Aviation altitudes are still given in feet nearly everywhere. The US survey foot, slightly longer at 1200/3937 m, was used for land surveying until the United States deprecated it at the end of 2022.
Related Units
Inch
in25.4 mm (exact)
The inch is defined as exactly 25.4 millimetres. Britain and the United States agreed this value in the 1959...
Yard
yd0.9144 m (exact)
The yard is three feet, exactly 0.9144 metres. Britain kept physical yard standards, the last being bronze bars of...
Mile
mi1609.344 m (exact)
The statute mile is 1760 yards or 5280 feet, exactly 1609.344 metres. It descends from the Roman mille passus of a...
Fathom
ftm1.8288 m (exact)
A fathom is six feet, exactly 1.8288 metres, roughly the span of a person's outstretched arms. It was the traditional...