Home › Unit Conversion › Kilometers per hour to Knots
Kilometers per hour to Knots (km/h to kn)
Convert kilometers per hour to knots: 1 km/h = 0.539957 kn. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 km/h = 0.539957 kn
knots = kilometers per hour × 0.5399568035 — reverse: kilometers per hour = knots × 1.852
The factor is derived from the SI definitions of both units (base unit: m/s) 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/h = 2.69978 kn
- 12.5 km/h = 6.74946 kn
- 100 km/h = 53.9957 kn
Kilometers per hour to knots conversion table
| Kilometers per hour (km/h) | Knots (kn) |
|---|---|
| 1 | 0.539957 |
| 2 | 1.07991 |
| 3 | 1.61987 |
| 4 | 2.15983 |
| 5 | 2.69978 |
| 6 | 3.23974 |
| 7 | 3.7797 |
| 8 | 4.31965 |
| 9 | 4.85961 |
| 10 | 5.39957 |
| 15 | 8.09935 |
| 20 | 10.7991 |
| 25 | 13.4989 |
| 30 | 16.1987 |
| 40 | 21.5983 |
| 50 | 26.9978 |
| 75 | 40.4968 |
| 100 | 53.9957 |
| 200 | 107.991 |
| 250 | 134.989 |
| 500 | 269.978 |
| 1000 | 539.957 |
FAQ
How many knots are in one kilometer per hour?
1 km/h = 0.539957 kn. 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 per hour to knots?
Multiply the value in kilometers per hour by 0.5399568035: knots = kilometers per hour × 0.5399568035. For example, 5 km/h = 2.69978 kn.
How do I convert knots back to kilometers per hour?
Multiply by the inverse factor 1.852 (kilometers per hour = knots × 1.852), or use the knots-to-kilometers per hour page.
Related conversions
- Knots to kilometers per hour (reverse)
- Speed Converter — all speed units in one tool
- Kilometers per hour to Miles per hour
- Miles per hour to Kilometers per hour
- Meters per second to Kilometers per hour
- Kilometers per hour to Meters per second
- Meters per second to Miles per hour
- Miles per hour to Meters per second
- Knots to Miles per hour
- Miles per hour to Knots
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=km%2Fh&to_unit=kn - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"km/h","to_unit":"kn"} - Markdown: https://tttkmbb.com/conversion/kmh-to-knots.md · JSON: https://tttkmbb.com/conversion/kmh-to-knots.json (add
?value=for a result) · Units: /api/v1/units?quantity=speed - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.