Convert Kilometers per Hour to Meters per Second
Kilometers per hour to meters per second is the conversion physics, engineering, and sports science all reach for, since m/s is the standard unit for speed in scientific calculations. The number always gets much smaller when you switch from km/h to m/s, because a second is a tiny slice of an hour.
Kilometers per hour to Meters per second conversion table
| Kilometers per hour (km/h) | Meters per second (m/s) |
|---|---|
| 1 | 0.277778 |
| 2 | 0.555556 |
| 3 | 0.833333 |
| 5 | 1.388889 |
| 10 | 2.777778 |
| 20 | 5.555556 |
| 50 | 13.888889 |
| 100 | 27.777778 |
| 500 | 138.888889 |
| 1,000 | 277.777778 |
The formula
To convert kilometers per hour to meters per second, multiply the speed in km/h by 0.277778:
m/s = km/h × 0.277778
A worked example
Say a sprinter's coach clocks a top speed of 36 km/h and wants it in meters per second, the unit used in track and field:
36 × 0.277778 = 10.00 m/s
That works out to a clean 10 meters per second — a very fast human sprinting speed.
Why it's an approximation
There are exactly 3.6 kilometers in one meter per second, since an hour holds 3,600 seconds and a kilometer holds 1,000 meters. But dividing 1 by 3.6 produces a repeating decimal, 0.2777..., that never resolves cleanly. 0.277778 is that value rounded to six digits, which is why the displayed result can be a hair off from a true fraction like 10/36.
When you'll use it
Working through physics or engineering problems, analyzing sprint or swim speeds in sports science, checking wind or fluid-flow speeds in scientific data, and converting vehicle speeds for calculations that expect meters and seconds.
Frequently asked questions
How many meters per second is 36 km/h?
Exactly 10 m/s. Multiply 36 by 0.277778 to get 10.00 — a clean number that's easy to remember for quick mental conversions.
Is the km/h to m/s conversion exact?
The underlying relationship is exact — there are exactly 3.6 km/h in 1 m/s — but 0.277778 itself is a rounded version of the repeating decimal 1÷3.6, so the digits you see are rounded for display.
What's a quick way to estimate km/h to m/s in my head?
Divide by 3.6, or roughly divide by 3.5. 100 km/h is close to 28 m/s; 36 km/h is exactly 10 m/s. For anything precise, use the factor above.