Convert Kilometers per hour to Meters per second
One kilometer per hour equals 0.277778 meters per second. Type any value to convert kilometers per hour to meters per second instantly — with a full reference table below.
Convert Kilometers per hour to Meters per second
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How to convert Kilometers per hour to Meters per second
To convert kilometers per hour to meters per second, multiply by 0.277778. One kilometer per hour equals 0.277778 m/s, and one meter per second equals 3.6 km/h.
- Take the value in kilometers per hour — for example 7.5 km/h.
- Multiply by 0.277778 (the number of meters per second in one kilometer per hour).
- 7.5 × 0.277778 = 2.083333 m/s.
Quick mental estimate: Divide the number of kilometers per hour by 3.6 — that is exact.
Kilometers per hour to Meters per second conversion table
| Kilometers per hour | Meters per second |
|---|---|
| 1 km/h | 0.277778 m/s |
| 5 km/h | 1.388889 m/s |
| 10 km/h | 2.777778 m/s |
| 20 km/h | 5.555556 m/s |
| 25 km/h | 6.944444 m/s |
| 30 km/h | 8.333333 m/s |
| 40 km/h | 11.11111 m/s |
| 50 km/h | 13.88889 m/s |
| 60 km/h | 16.66667 m/s |
| 70 km/h | 19.44444 m/s |
| 80 km/h | 22.22222 m/s |
| 100 km/h | 27.77778 m/s |
| 120 km/h | 33.33333 m/s |
| Meters per second | Kilometers per hour |
|---|---|
| 1 m/s | 3.6 km/h |
| 5 m/s | 18 km/h |
| 10 m/s | 36 km/h |
| 20 m/s | 72 km/h |
| 25 m/s | 90 km/h |
| 30 m/s | 108 km/h |
| 40 m/s | 144 km/h |
| 50 m/s | 180 km/h |
| 60 m/s | 216 km/h |
| 70 m/s | 252 km/h |
| 80 m/s | 288 km/h |
| 100 m/s | 360 km/h |
| 120 m/s | 432 km/h |
About converting Kilometers per hour to Meters per second
Kilometers per hour (km/h) and Meters per second (m/s) are both units of speed. The exact factor is 1 km/h = 0.277778 m/s, so multiply by 0.277778 to go from kilometers per hour to meters per second (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Meters per second to Kilometers per hour converter, or the full unit converter for every unit at once.
Real-world speed in kilometers per hour and meters per second
| Example | Kilometers per hour | Meters per second |
|---|---|---|
| A walking pace | ≈ 5.04 km/h | ≈ 1.4 m/s |
| Usain Bolt's top speed (2009) | ≈ 44.712 km/h | ≈ 12.42 m/s |
| The UK motorway limit (70 mph) | 112.6541 km/h | 31.2928 m/s |
| The German Autobahn advisory speed (130 km/h) | 130 km/h | 36.1111 m/s |
| The speed of sound (air, 20 °C) | ≈ 1,234.8 km/h | ≈ 343 m/s |
| An airliner at cruise | ≈ 900 km/h | ≈ 250 m/s |
“≈” marks typical values; the rest are defined or measured figures.
The units
Kilometres per hour — exactly 1/3.6 m/s.
Used for: Road speeds in most countries.
The SI unit of speed: one metre per second.
Used for: Science, wind speed and sport.
km/h, mph, ft/s and knots are all defined exactly in metres per second (a knot is one nautical mile, exactly 1,852 m, per hour).