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foot (ft) → kilometer (km)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

0
ft=km
0.01=0
0.1=0
1=0.000305
2=0.00061
3=0.000914
5=0.001524
10=0.003048
20=0.006096
50=0.01524
100=0.03048
1000=0.3048

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Brief explanation: foot to kilometer

Length conversion multiplies by a factor. Meter is the base unit in the metric system. Kilometer = 1000 m, mile ≈ 1609 m. Foot = 0.3048 m, inch = 2.54 cm. The metric system (km, m, cm, mm) is used worldwide. The imperial system (mi, ft, in, yd) is common in the United States and United Kingdom. When converting, multiply the value by the appropriate factor—for example, to convert km to miles, multiply by 0.621371.

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Common conversion examples: foot to kilometer

Reference values for quick comparison. Use the converter above for any amount.

  • 1 foot=0.0003 kilometer
  • 5 foot=0.0015 kilometer
  • 100 foot=0.0305 kilometer

About the Units

foot (ft)

Definition: A foot (ft) is a unit of length in the imperial and US customary systems. One foot equals 12 inches or exactly 0.3048 meters. It is one of the most common imperial units for measuring height and room dimensions.
History: The foot has ancient origins, likely based on the length of a human foot. Standardization varied by region until the international yard and pound agreement of 1959 defined the foot as exactly 0.3048 meters.
Current use: Feet are used for human height, room dimensions, and altitude in the US and UK. Real estate listings, aircraft altitude, and construction often use feet. The metric system uses meters for equivalent measurements.

kilometer (km)

Definition: A kilometer (km) is a unit of length in the International System of Units (SI). One kilometer equals 1,000 meters. The prefix kilo- indicates one thousand. It is the standard unit for expressing distances between geographical places on land in most of the world.
History: The kilometer is linked to the meter, which was originally defined in 1791 as one ten-millionth of the distance from the equator to the North Pole. The current meter is defined as the distance traveled by light in 1/299,792,458 of a second. The kilometer became widely adopted with the metric system in the 19th century.
Current use: The kilometer is the official unit for road distances in most countries. It appears on road signs, maps, and GPS devices. Running and cycling events are typically measured in kilometers. Countries like the US and UK still use miles for road distances, though the metric system is used in science and commerce.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: