Speed converter
Kilometers per Hour to Meters per Second
If you need to know how many Meters per Second one Kilometers per Hour contains, the answer is 0.27777778. The conversion is linear, so 10 km/h is 2.777778 m/s and 100 km/h is 27.777778 m/s. Use the converter for any other value.
Formula 1 km/h = 0.27777778 m/s
Need the other direction? Meters per Second to Kilometers per Hour.
How to convert Kilometers per Hour to Meters per Second
Kilometres per hour is the standard road-speed unit in most of the world. Metres per second is the SI unit of speed and the basis for scientific measurement.
To convert Kilometers per Hour to Meters per Second, multiply the value in km/h by 0.27777778. For example, 10 km/h × 0.27777778 = 2.777778 m/s. This works because the ratio between the two units is constant for every value in speed.
Worked examples
| km/h | m/s |
|---|---|
| 1 km/h | 0.27777778 m/s |
| 2.5 km/h | 0.69444444 m/s |
| 5 km/h | 1.388889 m/s |
| 10 km/h | 2.777778 m/s |
| 25 km/h | 6.944444 m/s |
| 50 km/h | 13.888889 m/s |
| 100 km/h | 27.777778 m/s |
Reverse conversion
| m/s | km/h |
|---|---|
| 1 m/s | 3.6 km/h |
| 5 m/s | 18 km/h |
| 10 m/s | 36 km/h |
| 25 m/s | 90 km/h |
| 50 m/s | 180 km/h |
| 100 m/s | 360 km/h |
When this conversion is useful
This is the calculation you need when you are reading a car spec, a weather report or an aviation document from another country. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 km/h is 277.777778 m/s.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
km/h to m/s conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Kilometers per Hour (km/h) | Meters per Second (m/s) |
|---|---|
| 1 km/h | 0.27777778 m/s |
| 2 km/h | 0.55555556 m/s |
| 3 km/h | 0.83333333 m/s |
| 4 km/h | 1.111111 m/s |
| 5 km/h | 1.388889 m/s |
| 6 km/h | 1.666667 m/s |
| 7 km/h | 1.944444 m/s |
| 8 km/h | 2.222222 m/s |
| 9 km/h | 2.5 m/s |
| 10 km/h | 2.777778 m/s |
| 11 km/h | 3.055556 m/s |
| 12 km/h | 3.333333 m/s |
| 13 km/h | 3.611111 m/s |
| 14 km/h | 3.888889 m/s |
| 15 km/h | 4.166667 m/s |
| 16 km/h | 4.444444 m/s |
| 17 km/h | 4.722222 m/s |
| 18 km/h | 5 m/s |
| 19 km/h | 5.277778 m/s |
| 20 km/h | 5.555556 m/s |
| 21 km/h | 5.833333 m/s |
| 22 km/h | 6.111111 m/s |
| 23 km/h | 6.388889 m/s |
| 24 km/h | 6.666667 m/s |
| 25 km/h | 6.944444 m/s |
| 26 km/h | 7.222222 m/s |
| 27 km/h | 7.5 m/s |
| 28 km/h | 7.777778 m/s |
| 29 km/h | 8.055556 m/s |
| 30 km/h | 8.333333 m/s |
| 31 km/h | 8.611111 m/s |
| 32 km/h | 8.888889 m/s |
| 33 km/h | 9.166667 m/s |
| 34 km/h | 9.444444 m/s |
| 35 km/h | 9.722222 m/s |
| 36 km/h | 10 m/s |
| 37 km/h | 10.277778 m/s |
| 38 km/h | 10.555556 m/s |
| 39 km/h | 10.833333 m/s |
| 40 km/h | 11.111111 m/s |
| 41 km/h | 11.388889 m/s |
| 42 km/h | 11.666667 m/s |
| 43 km/h | 11.944444 m/s |
| 44 km/h | 12.222222 m/s |
| 45 km/h | 12.5 m/s |
| 46 km/h | 12.777778 m/s |
| 47 km/h | 13.055556 m/s |
| 48 km/h | 13.333333 m/s |
| 49 km/h | 13.611111 m/s |
| 50 km/h | 13.888889 m/s |
| 60 km/h | 16.666667 m/s |
| 70 km/h | 19.444444 m/s |
| 80 km/h | 22.222222 m/s |
| 90 km/h | 25 m/s |
| 100 km/h | 27.777778 m/s |
Frequently asked questions
How many Meters per Second are in 1 Kilometers per Hour?
1 km/h equals 0.27777778 m/s.
How do I convert Kilometers per Hour to Meters per Second?
Multiply the km/h value by 0.27777778. Example: 25 km/h = 6.944444 m/s.
What is 2.5 km/h in m/s?
2.5 km/h = 0.69444444 m/s.
Is the km/h to m/s conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.