The US survey foot is 1200/3937 meters and is retained for legacy land records.
US survey feet to Kilometers Converter — ftUS to km
Convert US survey foot (ftUS) to Kilometer (km) using the exact conversion factor (1 us survey foot = 0.0003048006 kilometer). See the formula, worked examples, conversion table, history, and common uses.
US survey feet to Kilometers converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
Kilometer is 1000 meter units.
Result = input x 0.3048006096 / 1000.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting US survey feet to Kilometers
US survey foot and Kilometer both measure length. Specifically: The US survey foot is 1200/3937 meters and is retained for legacy land records, and kilometer is 1000 meter units.
Formula
kilometers = us survey feet × 0.000304800609601
This factor comes from each unit's defined relationship to the category's base unit: 1 us survey foot equals 0.304800609601 base units, and 1 kilometer equals 1000 base units, so dividing one by the other gives the direct us survey foot-to-kilometer factor of 0.000304800609601.
Simple example
1 ftUS × 0.0003048006096 = 0.0003048006 km
1 us survey foot = 0.0003048006 kilometers.
Real-world example
10 ftUS × 0.0003048006096 = 0.0030480061 km
10 us survey feet = 0.0030480061 kilometers.
Conversion table
| US survey foot (ftUS) | Kilometer (km) |
|---|---|
| 1 ftUS | 0.0003048006 km |
| 5 ftUS | 0.001524003 km |
| 10 ftUS | 0.0030480061 km |
| 21.0975 ftUS | 0.0064305309 km |
| 42.195 ftUS | 0.0128610617 km |
| 100 ftUS | 0.030480061 km |
Reverse conversion: Kilometer to US survey foot
0.0003048006 km × 3280.833333 = 0.9999999685 ftUS
0.0003048006 kilometers = 0.9999999685 us survey feet.
us survey feet = kilometers × 3280.83333333
For a page dedicated to this direction, see Kilometer to US survey foot.
Understanding the US survey foot (ftUS)
The US survey foot is 1200/3937 meters and is retained for legacy land records.
Understanding the Kilometer
Kilometer (km) measures distance. A kilometer is 1,000 meters — the meter is the SI base unit of length. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard road, distance, and mapping unit in nearly every country except the United States
Uses of the Kilometer today
- Road signage, speed limits, and vehicle odometers outside the US
- Geographic and mapping distances
- Endurance sports (marathons are measured in kilometers internationally, though the marathon distance itself is a fixed value in both systems)
History of the Kilometer
The meter was defined during the French Revolutionary metric reforms as one ten-millionth of the distance from the North Pole to the Equator along a meridian through Paris. 'Kilo-' is simply the SI prefix for 1,000, making the kilometer a direct decimal multiple.
The meter itself has been redefined several times as measurement precision improved — from a physical platinum-iridium bar (1889) to a krypton-86 wavelength (1960) to its current definition (1983) as the distance light travels in a fixed fraction of a second.
Historical origin. Kilometer was not the invention of a single named person; it developed through the process described above.
Kilometer — sources
- BIPM — The metre (SI base unit) — Current definition and history of the meter.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilometers are in 1 us survey foot?
1 us survey foot equals 0.0003048006 kilometers, using the exact defined conversion factor rather than an estimate.
How do I convert us survey foot to kilometer?
Multiply the us survey foot value by 0.0003048006096. The converter above does this instantly to whatever precision you set.
How do I convert kilometer back to us survey foot?
Use the reverse factor: 1 kilometer equals 3,280.833333 us survey feet. You can also use the swap control in the converter above to flip the direction instantly.
What is a us survey foot?
US survey foot (ftUS) is a unit of length.
What is a kilometer?
Kilometer (km) measures distance. A kilometer is 1,000 meters — the meter is the SI base unit of length. It is classified as a SI derived (metric prefix) unit.
Is the us survey foot to kilometer conversion exact?
Yes. Both us survey foot and kilometer are defined by fixed standards rather than physical artifacts, so the factor of 0.0003048006096 used above is exact to as many digits as you choose to display.