How to convert feet to kilometers
To convert a measurement in feet to kilometers, multiply the value by 0.0003048. The conversion factor comes from the relationship between both units and the meter (the SI base unit of length).
For example, to convert 5 ft to kilometers: 5 × 0.0003048 = 0.001524 km.
What is a foot?
A foot is an imperial unit of length equal to 12 inches or exactly 0.3048 meters. One of the oldest units of measurement, based on the human foot. Used in ancient civilizations from Egypt to Rome. The international foot was defined as exactly 0.3048 meters in 1959.
Common uses of feet include: Human height in the US and UK (e.g. 5'10"); Room dimensions and ceiling height; Aviation altitude measurement worldwide; Construction and building codes in imperial countries.
What is a kilometer?
A kilometer is a metric unit of length equal to 1,000 meters or approximately 0.621 miles. The kilometer was introduced with the metric system in France in 1795, derived from the Greek 'khilioi' (thousand) and 'metron' (measure). It became the standard unit for measuring road distances in most countries.
Common uses of kilometers include: Road distances and speed limits in most countries; Running events (5K, 10K, marathon distances); Geographic distances between cities; Aviation altitude reporting in some regions.
When you need to convert feet to kilometers
Converting feet to kilometers is useful in scientific calculations, international trade, and any context where measurements need to be expressed in the other system for clarity or compliance.
Feet to kilometers worked examples
Here are some common values converted:
1 ft = 0.0003048 km 5 ft = 0.001524 km 10 ft = 0.003048 km 50 ft = 0.01524 km 100 ft = 0.03048 km
Frequently asked questions
How many kilometers are in one foot?
One foot (ft) equals 0.0003048 kilometers (km). Multiply any value in feet by 0.0003048 to convert to kilometers.
How do I convert feet to kilometers?
Multiply the value in feet by 0.0003048. For example, 5 ft × 0.0003048 = 0.001524 km.
How do I convert kilometers to feet?
Multiply the value in kilometers by 3,280.8399, or divide by 0.0003048. Use the swap button on the converter above to reverse the direction.
Is the foot to kilometer conversion exact?
Yes, the conversion is exact. Since 1959, one inch is defined as exactly 25.4 mm (the international yard and pound agreement), so all metric-imperial length conversions use exact factors.
What is the formula for feet to kilometers?
The formula is: km = ft × 0.0003048. This is derived from the definition of both units relative to the meter (the SI base unit of length).