How do I convert Foot (ft) to Kilometer (km)?

1 ft equals 0.000305 km using SI-based conversion and precise factors.

What is the formula to convert Foot (ft) to Kilometer (km)?

This is a linear unit conversion using a constant factor between units.

How can I share a direct ft to km result?

Use the shareable URL: https://measurecalc.com/convert/foot-to-kilometer

Convert Foot (ft) to Kilometer (km)

Q: Is Foot (ft) to Kilometer (km) conversion exact?

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

Category: Length

Value From To Precision

0.000305 km

1 ft = 0.000305 km

High-precision rounding: 6 decimals

How to convert foot (ft) to kilometer (km)

Length measures distance or size. In SI it derives from the meter, defined via the speed of light, which ensures exact, reproducible conversions. Typical applications include construction, mapping, manufacturing tolerances, and navigation; legacy units like inches and feet remain common in trade and building plans.

This converter calculates Foot (ft) to Kilometer (km) values by using the correct conversion rule for the Length category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.

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Quick conversion table

Handy values for Foot (ft) to Kilometer (km). Click a value to open that exact result.

Foot (ft)	Kilometer (km)
1	0.000305
0.5	0.000152
2.5	0.000762
10	0.003048

Conversion formula

Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).

Common mistakes

Confusing international foot (0.3048 m) with legacy ‘US survey foot’ in old datasets.
Rounding mid-calculation; keep precision to the end.

Unit facts

Foot (ft): The foot is exactly 0.3048 meters (1959). Common in construction, aviation (runway lengths), and everyday use in US/UK.
Kilometer (km): One kilometer equals 1,000 meters; common for road distances and maps.

About Foot (ft)

Foot (ft)

Equals 12 inches; exactly 0.3048 m. Common for human height, room dimensions, and altitude in aviation (with feet for flight levels).

History: Standardized as the ‘international foot’ in 1959; the legacy US survey foot persisted for geodesy until its retirement in 2023 in favor of the international definition.

About Kilometer (km)

Kilometer (km)

Equals 1,000 meters. Common for road distances, running events (5k/10k), and geographic scales. Convenient decimal multiple that keeps numbers human-readable.

History: Spread with metrication in the 19th–20th centuries. Adopted by most countries for signage and mapping, replacing miles in many contexts.

Frequently asked questions

How many Kilometer (km) are in one Foot (ft)?

1 Foot (ft) equals 0.000305 Kilometer (km).

Is Foot (ft) to Kilometer (km) conversion exact?

Many unit conversions are exact by definition, while others use standardized conversion constants.

What is the fastest way to convert Foot (ft) to Kilometer (km)?

Enter a value in Foot (ft), choose Kilometer (km) as the target unit, and the calculator will instantly return the result.

Convert Foot (ft) to other units

ft → cm Centimeter (cm)
ft → ch Chain (ch)
ft → fur Furlong (fur)
ft → in Inch (in)
ft → m Meter (m)
ft → mi Mile (mi)

Convert other units to Kilometer (km)

cm → km Centimeter (cm)
ch → km Chain (ch)
fur → km Furlong (fur)
in → km Inch (in)
m → km Meter (m)
mi → km Mile (mi)