Kilometer/Hour to Meter/Second (km/h to m/s)
Result
0.2777777778 Meter/Second
Formula
m/s = km/h × 0.2777777778
1 km/h = 0.2777777778 m/s, and 1 m/s = 3.6 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 × 0.2777777778 = 0.27777778 m/s
- 10 km/h × 0.2777777778 = 2.7777778 m/s
- 100 km/h × 0.2777777778 = 27.777778 m/s
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 Meter/Second table
| Kilometer/Hour (km/h) | Meter/Second (m/s) |
|---|---|
| 1 | 0.27777778 |
| 2 | 0.55555556 |
| 5 | 1.3888889 |
| 10 | 2.7777778 |
| 20 | 5.5555556 |
| 50 | 13.888889 |
| 100 | 27.777778 |
| 1,000 | 277.77778 |
The units
- Kilometer/Hour (km/h)
- Kilometres per hour: 1 km/h = 1/3.6 m/s ≈ 0.27778 m/s.
- Meter/Second (m/s)
- A unit of speed.
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