The kilometer per hour
The kilometer per hour (km/h) is the standard speed unit on road signs almost everywhere except the United States and the United Kingdom. To convert to meters per second, divide by 3.6 (since 1 km = 1000 m and 1 h = 3600 s).
10 Kilometers per hour to Meters per second
10 km/h = 2.77778 m/s (kilometer per hour → meter per second)
10 km/h = 2.77778 m/s
10 kilometers per hour (km/h) equals 2.77778 meters per second (m/s). The conversion uses the exact factor 0.277778: 10 × 0.277778 = 2.77778.
Formula
Meters per second = Kilometers per hour × 0.277778Quick
10 km/h in context
How 10 kilometers per hour compares to its arithmetic neighbours, converted to meters per second.
| Relation | kilometers per hour | meters per second |
|---|---|---|
| ÷10 | 1 km/h | 0.277778 m/s |
| ÷2 (half) | 5 km/h | 1.38889 m/s |
| ×1 (this value) | 10 km/h | 2.77778 m/s |
| ×2 (double) | 20 km/h | 5.55556 m/s |
| ×5 | 50 km/h | 13.8889 m/s |
| ×10 | 100 km/h | 27.7778 m/s |
When to use kilometers per hour → meters per second
Kilometres per hour to metres per second divides by 3.6 exactly. A 100 km/h motorway speed is 27.78 m/s; a 5 km/h walking pace is 1.39 m/s. Physics problems involving stopping distance, kinetic energy, or projectile motion want speed in m/s for the calculations to use clean SI units — converting to km/h only at the end for readability.
Structural engineers sizing wind-load resistance need this division: a building code's 108 km/h design wind speed becomes 30 m/s for the drag-force calculation, since force equations use velocity squared in SI units directly. Weather-radar Doppler output is also in m/s internally, so any public wind-speed bulletin quoted in km/h has already passed through this conversion once for readability.
How to convert kilometers per hour to meters per second
Take your value
Start with your value in kilometers per hour.
Multiply by 0.277778
Multiply the kilometer per hour value by 0.277778. This is the exact conversion factor from kilometers per hour to meters per second.
Read the result
The product is your value in meters per second. For example, 5 km/h × 0.277778 = 1.38889 m/s.
Conversion formula
The exact factor from kilometers per hour to meters per second is 0.277778.
Meters per second = Kilometers per hour × 0.277778
Kilometers per hour to Meters per second conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Kilometers per hour (km/h) | Meters per second (m/s) |
|---|---|
| 1 km/h | 0.27778 m/s |
| 2 km/h | 0.55556 m/s |
| 3 km/h | 0.83333 m/s |
| 4 km/h | 1.1111 m/s |
| 5 km/h | 1.3889 m/s |
| 6 km/h | 1.6667 m/s |
| 7 km/h | 1.9444 m/s |
| 8 km/h | 2.2222 m/s |
| 9 km/h | 2.5 m/s |
| 10 km/h | 2.7778 m/s |
| 12 km/h | 3.3333 m/s |
| 15 km/h | 4.1667 m/s |
| 18 km/h | 5 m/s |
| 20 km/h | 5.5556 m/s |
| 22 km/h | 6.1111 m/s |
| 25 km/h | 6.9444 m/s |
| 28 km/h | 7.7778 m/s |
| 30 km/h | 8.3333 m/s |
| 32 km/h | 8.8889 m/s |
| 35 km/h | 9.7222 m/s |
| 40 km/h | 11.111 m/s |
| 45 km/h | 12.5 m/s |
| 50 km/h | 13.889 m/s |
| 55 km/h | 15.278 m/s |
| 60 km/h | 16.667 m/s |
| 65 km/h | 18.056 m/s |
| 70 km/h | 19.444 m/s |
| 75 km/h | 20.833 m/s |
| 80 km/h | 22.222 m/s |
| 85 km/h | 23.611 m/s |
| 90 km/h | 25 m/s |
| 95 km/h | 26.389 m/s |
| 100 km/h | 27.778 m/s |
| 110 km/h | 30.556 m/s |
| 120 km/h | 33.333 m/s |
| 130 km/h | 36.111 m/s |
| 140 km/h | 38.889 m/s |
| 150 km/h | 41.667 m/s |
| 160 km/h | 44.444 m/s |
| 180 km/h | 50 m/s |
| 200 km/h | 55.556 m/s |
| 220 km/h | 61.111 m/s |
| 250 km/h | 69.444 m/s |
| 280 km/h | 77.778 m/s |
| 300 km/h | 83.333 m/s |
| 350 km/h | 97.222 m/s |
| 400 km/h | 111.11 m/s |
| 500 km/h | 138.89 m/s |
| 700 km/h | 194.44 m/s |
| 1000 km/h | 277.78 m/s |
Real-world reference
Urban speed limits are typically 50 km/h. Highway speed limits range from 100 to 130 km/h in most of Europe. In meters per second, that gives you: 1 km/h = 0.277778 m/s, 10 km/h = 2.77778 m/s, 100 km/h = 27.7778 m/s.
Frequently asked questions
- What is 10 kilometers per hour in meters per second?
- 10 kilometers per hour equals 2.77778 meters per second.
- What is half of 10 km/h in meters per second?
- Half of 10 km/h is 5 km/h, which equals 1.38889 meters per second.
- What is 20 km/h (double 10) in meters per second?
- 20 km/h equals 5.55556 meters per second — exactly twice the 2.77778 meters per second you get from 10 km/h, since the conversion is linear.
- Is 10 km/h a lot in meters per second?
- 10 km/h converts to 2.77778 meters per second. That's over a whole meter per second.
- How is 10 km/h to m/s calculated?
- 10 km/h × 0.277778 (the exact kilometer per hour-to-meter per second factor) = 2.77778 m/s.
About the kilometer per hour and the meter per second
The meter per second
The meter per second (m/s) is the SI derived unit of speed. It is the preferred unit in physics, engineering, and any scientific context. The speed of light in vacuum is exactly 299,792,458 m/s, which is how the meter itself is now defined.