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Feet to Kilometers (ft to km)
Convert feet to kilometers: 1 ft = 0.0003048 km. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 ft = 0.0003048 km
kilometers = feet × 0.0003048 — reverse: feet = kilometers × 3280.839895
The factor is derived from the SI definitions of both units (base unit: m) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 ft = 0.001524 km
- 12.5 ft = 0.00381 km
- 100 ft = 0.03048 km
Feet to kilometers conversion table
| Feet (ft) | Kilometers (km) |
|---|---|
| 1 | 0.0003048 |
| 2 | 0.0006096 |
| 3 | 0.0009144 |
| 4 | 0.0012192 |
| 5 | 0.001524 |
| 6 | 0.0018288 |
| 7 | 0.0021336 |
| 8 | 0.0024384 |
| 9 | 0.0027432 |
| 10 | 0.003048 |
| 15 | 0.004572 |
| 20 | 0.006096 |
| 25 | 0.00762 |
| 30 | 0.009144 |
| 40 | 0.012192 |
| 50 | 0.01524 |
| 75 | 0.02286 |
| 100 | 0.03048 |
| 200 | 0.06096 |
| 250 | 0.0762 |
| 500 | 0.1524 |
| 1000 | 0.3048 |
FAQ
How many kilometers are in one foot?
1 ft = 0.0003048 km. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert feet to kilometers?
Multiply the value in feet by 0.0003048: kilometers = feet × 0.0003048. For example, 5 ft = 0.001524 km.
How do I convert kilometers back to feet?
Multiply by the inverse factor 3280.839895 (feet = kilometers × 3280.839895), or use the kilometers-to-feet page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=ft&to_unit=km - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"ft","to_unit":"km"} - Markdown: https://tttkmbb.com/conversion/feet-to-km.md · JSON: https://tttkmbb.com/conversion/feet-to-km.json (add
?value=for a result) · Units: /api/v1/units?quantity=length - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.