Conversion tool
Convert feet to kilometers instantly
Enter a value, see the result, copy it, and save a PDF snapshot.
Input
Type a value, then press Enter to calculate.
Result
0.000 km
Rounded for readability. Use the arrows to increase or decrease the number of shown digits.
Estimation mode
Enter your estimate in km, then reveal to compare.
Reveal summary
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Use this space for project notes before saving as PDF.
Disclaimer: Use calculations at your own risk. For critical applications, verify results against your governing standards/specifications.
How it works
We use km = ft x 0.0003048.
Exact relationship: 1 ft = 0.0003048 km.
Example: 1 ft = 0.000 km.
Notes: Results are rounded in the default view.
Examples
- 1 ft = 0.000 km
- 10 ft = 0.003 km
- 100 ft = 0.030 km
FAQ
What physical quantity do feet and kilometers express?
A foot expresses larger lengths than an inch and is common for room, equipment, and field dimensions. A kilometer is a long-distance metric length unit equal to one thousand meters.
What is the difference between feet and kilometers?
Feet belong to the imperial and U.S. customary family, while kilometers belong to the metric SI system. These pages help bridge that system crossover in engineering, construction, manufacturing, and technical communication.
What is the history of the foot?
The foot is an old customary unit that is now standardized internationally as exactly 0.3048 meter.
What is the history of the kilometer?
The kilometer is a decimal metric unit created as part of the metric system and scales cleanly from the meter.
Were the foot and kilometer discovered by a specific person?
The foot developed historically from customary measurement traditions rather than from one inventor. The kilometer came from metric standardization and is not credited to one discoverer.
Where are feet and kilometers used in science and engineering?
Feet are common in construction drawings, site dimensions, piping runs, architectural plans, and U.S. facility layouts. Kilometers are common in transportation, mapping, civil works, and international infrastructure documentation.
Why show units with every result?
Units remove ambiguity and help prevent copy-and-paste mistakes when dimensions move between drawings, purchasing notes, setup sheets, calculations, and inspection records.
Can I trust this for production-critical design?
Use this for convenience and verify against your governing standard, print, or specification for critical applications. The conversion math is simple, but process control still matters more than a quick lookup tool.
References
- Exact constant used: 1 ft = 0.0003048 km.
- Unit definitions are aligned with modern customary and SI relationships.