km/h to m/s Converter
1 kilometre per hour = 0.277778 metres per second.
Enter a value
Result
1 kilometre per hour =
0.277778 m/s
1 km/h × 0.277778 = 0.277778 m/s
1 mph = 1.609344 km/h exactly
The working
- 1. Convert 1 km/h to metre per seconds: 1 × 0.277778 = 0.277778.
- 2. Convert to m/s: 0.277778 ÷ 1 = 0.277778.
1 km/h in every unit
Typical speeds
- Walking
- 5 km/h
- Cycling
- 20 km/h
- Motorway limit (UK)
- 70 mph
- Speed of sound
- 1,235 km/h
Conversion table
Kilometres per hour to Metres per second
| Kilometres per hour | Metres per second |
|---|---|
| 1 | 0.27778 |
| 2 | 0.55556 |
| 3 | 0.83333 |
| 4 | 1.1111 |
| 5 | 1.3889 |
| 6 | 1.6667 |
| 7 | 1.9444 |
| 8 | 2.2222 |
| 9 | 2.5 |
| 10 | 2.7778 |
| 15 | 4.1667 |
| 20 | 5.5556 |
| 25 | 6.9444 |
| 50 | 13.889 |
| 100 | 27.778 |
Metres per second to Kilometres per hour
| Metres per second | Kilometres per hour |
|---|---|
| 1 | 3.6 |
| 2 | 7.2 |
| 3 | 10.8 |
| 4 | 14.4 |
| 5 | 18 |
| 6 | 21.6 |
| 7 | 25.2 |
| 8 | 28.8 |
| 9 | 32.4 |
| 10 | 36 |
| 15 | 54 |
| 20 | 72 |
| 25 | 90 |
| 50 | 180 |
| 100 | 360 |
Formula and worked example
metres per second = kilometres per hour × 0.2777777778.
Convert 36 kilometres per hour to metres per second: 36 × 0.27777778 = 10 m/s.
When you need this
Physics and engineering calculations need speeds in metres per second, the SI unit, so km/h values from everyday life need converting first.
Questions people ask
How many metres per second are in a kilometre per hour?
One kilometre per hour is 0.27777778 metres per second.
How do I convert kilometres per hour to metres per second?
Multiply the number of kilometres per hour by 0.27777778, or divide by 3.6.
What is 10 km/h in m/s?
10 kilometres per hour is 2.77778 metres per second.
How do I convert metres per second back to kilometres per hour?
Multiply by 3.6: one metre per second is 3.6 kilometres per hour.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
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