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Kilometers to Feet (km to ft)
Convert kilometers to feet: 1 km = 3280.84 ft. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 km = 3280.84 ft
feet = kilometers × 3280.839895 — reverse: kilometers = feet × 0.0003048
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 km = 16404.2 ft
- 12.5 km = 41010.5 ft
- 100 km = 328084 ft
Kilometers to feet conversion table
| Kilometers (km) | Feet (ft) |
|---|---|
| 1 | 3280.84 |
| 2 | 6561.68 |
| 3 | 9842.52 |
| 4 | 13123.4 |
| 5 | 16404.2 |
| 6 | 19685 |
| 7 | 22965.9 |
| 8 | 26246.7 |
| 9 | 29527.6 |
| 10 | 32808.4 |
| 15 | 49212.6 |
| 20 | 65616.8 |
| 25 | 82021 |
| 30 | 98425.2 |
| 40 | 131234 |
| 50 | 164042 |
| 75 | 246063 |
| 100 | 328084 |
| 200 | 656168 |
| 250 | 820210 |
| 500 | 1640420 |
| 1000 | 3280840 |
FAQ
How many feet are in one kilometer?
1 km = 3280.84 ft. 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 kilometers to feet?
Multiply the value in kilometers by 3280.839895: feet = kilometers × 3280.839895. For example, 5 km = 16404.2 ft.
How do I convert feet back to kilometers?
Multiply by the inverse factor 0.0003048 (kilometers = feet × 0.0003048), or use the feet-to-kilometers page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=km&to_unit=ft - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"km","to_unit":"ft"} - Markdown: https://tttkmbb.com/conversion/km-to-feet.md · JSON: https://tttkmbb.com/conversion/km-to-feet.json (add
?value=for a result) · Units: /api/v1/units?quantity=length - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.