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).
500 Kilometers per hour to Meters per second
500 km/h = 138.889 m/s (kilometer per hour → meter per second)
500 km/h = 138.889 m/s
500 kilometers per hour (km/h) equals 138.889 meters per second (m/s). The conversion uses the exact factor 0.277778: 500 × 0.277778 = 138.889.
Formula
Meters per second = Kilometers per hour × 0.277778Quick
500 km/h in context
How 500 kilometers per hour compares to its arithmetic neighbours, converted to meters per second.
| Relation | kilometers per hour | meters per second |
|---|---|---|
| ÷10 | 50 km/h | 13.8889 m/s |
| ÷2 (half) | 250 km/h | 69.4444 m/s |
| ×1 (this value) | 500 km/h | 138.889 m/s |
| ×2 (double) | 1000 km/h | 277.778 m/s |
| ×5 | 2500 km/h | 694.444 m/s |
| ×10 | 5000 km/h | 1388.89 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 500 kilometers per hour in meters per second?
- 500 kilometers per hour equals 138.889 meters per second.
- What is half of 500 km/h in meters per second?
- Half of 500 km/h is 250 km/h, which equals 69.4444 meters per second.
- What is 1000 km/h (double 500) in meters per second?
- 1000 km/h equals 277.778 meters per second — exactly twice the 138.889 meters per second you get from 500 km/h, since the conversion is linear.
- Is 500 km/h a lot in meters per second?
- 500 km/h converts to 138.889 meters per second. That's over a whole meter per second.
- How is 500 km/h to m/s calculated?
- 500 km/h × 0.277778 (the exact kilometer per hour-to-meter per second factor) = 138.889 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.