Kilometer/Hour to Knot (km/h to kn)
Result
0.5399568035 Knot
Formula
kn = km/h × 0.5399568035
1 km/h = 0.5399568035 kn, and 1 kn = 1.852 km/h.
Speed units are a length divided by a time: 1 km/h = 1/3.6 m/s, 1 mph = 0.44704 m/s exactly, and 1 knot = 1 nautical mile per hour = 1,852/3,600 m/s.
Worked examples
- 1 km/h × 0.5399568035 = 0.5399568 kn
- 10 km/h × 0.5399568035 = 5.399568 kn
- 100 km/h × 0.5399568035 = 53.99568 kn
Common mistakes
- A knot is a nautical mile per hour, so 1 kn = 1.852 km/h and 1.15078 mph — not 1 mph.
- Weather services quote wind in km/h, m/s, mph or knots depending on country; check the unit before comparing forecasts.
Kilometer/Hour to Knot table
| Kilometer/Hour (km/h) | Knot (kn) |
|---|---|
| 1 | 0.5399568 |
| 2 | 1.0799136 |
| 5 | 2.699784 |
| 10 | 5.399568 |
| 20 | 10.799136 |
| 50 | 26.99784 |
| 100 | 53.99568 |
| 1,000 | 539.9568 |
The units
- Kilometer/Hour (km/h)
- Kilometres per hour: 1 km/h = 1/3.6 m/s ≈ 0.27778 m/s.
- Knot (kn)
- Knot: one nautical mile (1,852 m) per hour, used in aviation and shipping.
Sources for these factors
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy