KMH to M/S Converter
Convert kilometers per hour to meters per second instantly. One kilometer per hour equals exactly 0.2777778 meters per second. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
Kilometers per hour to meters per second calculator
How to convert kilometers per hour to meters per second
Worked example: convert 120 kilometers per hour to meters per second. Using meters per second ← kilometers per hour × 0.2777777778, we get 120 × 0.2777777778 = 33.333333 m/s. To check the result, convert back: 33.333333 m/s ÷ 0.2777777778 = 120 km/h.
Kilometers per hour to meters per second chart
| Kilometers per hour (km/h) | Meters per second (m/s) |
|---|---|
| 1 km/h | 0.2777778 m/s |
| 2 km/h | 0.5555556 m/s |
| 3 km/h | 0.8333333 m/s |
| 4 km/h | 1.111111 m/s |
| 5 km/h | 1.388889 m/s |
| 6 km/h | 1.666667 m/s |
| 8 km/h | 2.222222 m/s |
| 10 km/h | 2.777778 m/s |
| 12 km/h | 3.333333 m/s |
| 15 km/h | 4.166667 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 |
| 75 km/h | 20.83333 m/s |
| 100 km/h | 27.77778 m/s |
| 150 km/h | 41.66667 m/s |
| 200 km/h | 55.55556 m/s |
| 250 km/h | 69.44444 m/s |
| 500 km/h | 138.8889 m/s |
| 1,000 km/h | 277.7778 m/s |
Meters per second to kilometers per hour (reverse)
| Meters per second (m/s) | Kilometers per hour (km/h) |
|---|---|
| 1 m/s | 3.6 km/h |
| 2 m/s | 7.2 km/h |
| 5 m/s | 18 km/h |
| 10 m/s | 36 km/h |
| 20 m/s | 72 km/h |
| 50 m/s | 180 km/h |
| 100 m/s | 360 km/h |
| 250 m/s | 900 km/h |
| 500 m/s | 1,800 km/h |
| 1,000 m/s | 3,600 km/h |
About the kilometer per hour and the meter per second
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.
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.
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 kilometers per hour and meters per second
| Everyday example (approximate) | In kilometers per hour | In meters per second |
|---|---|---|
| A slow walk | 5.04 km/h | 1.4 m/s |
| A jogger | 10.8 km/h | 3 m/s |
| A city cyclist | 19.8 km/h | 5.5 m/s |
| Usain Bolt's peak sprint speed | 44.64 km/h | 12.4 m/s |
| A car on a city road | 50.004 km/h | 13.89 m/s |
| A car on a highway | 100.01 km/h | 27.78 m/s |
Kilometers per hour to meters per second FAQ
How many meters per second are in one kilometer per hour?
One kilometer per hour equals exactly 0.2777777778 meters per second. In the other direction, one meter per second equals 3.6 kilometers per hour.
How do I convert kilometers per hour to meters per second without a calculator?
convert 120 kilometers per hour to meters per second. Using meters per second ← kilometers per hour × 0.2777777778, we get 120 × 0.2777777778 = 33.333333 m/s. To check the result, convert back: 33.333333 m/s ÷ 0.2777777778 = 120 km/h. For a quick estimate, round the factor to 0.28. Then 120 km/h is about 33.6 m/s, compared with the exact 33.3333 m/s (an error of 0.8%). That is close enough for planning, but use the calculator above when the number matters.
What is a slow walk in meters per second?
A slow walk is about 5.04 kilometers per hour, which is 1.4 meters per second. Treat that as an approximate everyday figure rather than an official measurement.
Are the kilometers per hour and meters per second the same in every country?
One kilometer per hour is exactly 5/18 m/s. Meters per second is the SI unit of speed.