M/S to KMH Converter
Convert meters per second to kilometers per hour instantly. One meter per second equals exactly 3.6 kilometers per hour. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
Meters per second to kilometers per hour calculator
How to convert meters per second to kilometers per hour
Worked example: convert 15 meters per second to kilometers per hour. Using kilometers per hour ← meters per second × 3.6, we get 15 × 3.6 = 54 km/h. To check the result, convert back: 54 km/h ÷ 3.6 = 15 m/s.
Meters per second to kilometers per hour chart
| Meters per second (m/s) | Kilometers per hour (km/h) |
|---|---|
| 1 m/s | 3.6 km/h |
| 2 m/s | 7.2 km/h |
| 3 m/s | 10.8 km/h |
| 4 m/s | 14.4 km/h |
| 5 m/s | 18 km/h |
| 6 m/s | 21.6 km/h |
| 8 m/s | 28.8 km/h |
| 10 m/s | 36 km/h |
| 12 m/s | 43.2 km/h |
| 15 m/s | 54 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 |
| 75 m/s | 270 km/h |
| 100 m/s | 360 km/h |
| 150 m/s | 540 km/h |
| 200 m/s | 720 km/h |
| 250 m/s | 900 km/h |
| 500 m/s | 1,800 km/h |
| 1,000 m/s | 3,600 km/h |
Kilometers per hour to meters per second (reverse)
| Kilometers per hour (km/h) | Meters per second (m/s) |
|---|---|
| 1 km/h | 0.2777778 m/s |
| 2 km/h | 0.5555556 m/s |
| 5 km/h | 1.388889 m/s |
| 10 km/h | 2.777778 m/s |
| 20 km/h | 5.555556 m/s |
| 50 km/h | 13.88889 m/s |
| 100 km/h | 27.77778 m/s |
| 250 km/h | 69.44444 m/s |
| 500 km/h | 138.8889 m/s |
| 1,000 km/h | 277.7778 m/s |
About the meter per second and the kilometer per hour
Meters per second is the SI unit of speed, used in physics, engineering, wind-speed forecasts in many countries and athletics. Sound in air at 20 °C travels at about 343 m/s.
Kilometers per hour is the speed unit on road signs in most countries. A speed of 100 km/h is about 62 mph and 27.8 m/s.
One meter per second equals 3.6 kilometers per hour, which makes the meter per second the faster unit of the two.
Everyday sizes in meters per second and kilometers per hour
| Everyday example (approximate) | In meters per second | In kilometers per hour |
|---|---|---|
| A slow walk | 1.4 m/s | 5.04 km/h |
| A jogger | 3 m/s | 10.8 km/h |
| A city cyclist | 5.5 m/s | 19.8 km/h |
| Usain Bolt's peak sprint speed | 12.4 m/s | 44.64 km/h |
| A car on a city road | 13.89 m/s | 50.004 km/h |
| A car on a highway | 27.78 m/s | 100.01 km/h |
Meters per second to kilometers per hour FAQ
How many kilometers per hour are in one meter per second?
One meter per second equals exactly 3.6 kilometers per hour. In the other direction, one kilometer per hour equals 0.27777778 meters per second.
How do I convert meters per second to kilometers per hour without a calculator?
convert 15 meters per second to kilometers per hour. Using kilometers per hour ← meters per second × 3.6, we get 15 × 3.6 = 54 km/h. To check the result, convert back: 54 km/h ÷ 3.6 = 15 m/s. For a quick estimate, round the factor to 3.6. Then 15 m/s is about 54 km/h, compared with the exact 54 km/h (an error of 0%). That is close enough for planning, but use the calculator above when the number matters.
What is usain Bolt's peak sprint speed in kilometers per hour?
Usain Bolt's peak sprint speed is about 12.4 meters per second, which is 44.64 kilometers per hour. Treat that as an approximate everyday figure rather than an official measurement.
Are the meters per second and kilometers per hour the same in every country?
Meters per second is the SI unit of speed. One kilometer per hour is exactly 5/18 m/s.