Quick Answer: Meters per Second to Kilometers per Hour
One meter per second equals 3.6 kilometers per hour (1 m/s = 3.6 km/h).
Conversely, 1 km/h = 0.277777778 m/s.
Formula: km/h = m/s × 3.6
Worked examples
- 1 m/s = 3.6 km/h
- 2 m/s = 7.2 km/h
- 5 m/s = 18 km/h
Method and limitations
To convert meters per second to kilometers per hour, multiply the m/s value by 3.6. Calculations use full-precision constants; displayed values are rounded to at most 9 significant figures. Results are rounded for display only. Full precision is kept internally, so long chains of conversions do not accumulate rounding error. Where US customary and imperial units share a name (for example fluid ounces and gallons), this page uses the US customary definition and says so explicitly.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
To convert meters per second to kilometers per hour, multiply the m/s value by 3.6.
Step-by-Step Conversion Guide
Follow these steps to convert meters per second to kilometers per hour manually:
Start with your value in meters per second
Example: You want to convert 5 m/s
Apply the conversion formula
Use the formula: km/h = m/s × 3.6
Calculate the result
5 m/s = 18 km/h
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
To convert meters per second to kilometers per hour, multiply the m/s value by 3.6.
Common Conversions
| Meters per Second (m/s) | Kilometers per Hour (km/h) | Kilometers per Hour → Meters per Second |
|---|---|---|
| 1 m/s | 3.6 | 1 km/h = 0.277778 m/s |
| 2 m/s | 7.2 | 2 km/h = 0.555556 m/s |
| 5 m/s | 18 | 5 km/h = 1.38889 m/s |
| 10 m/s | 36 | 10 km/h = 2.77778 m/s |
| 15 m/s | 54 | 15 km/h = 4.16667 m/s |
| 20 m/s | 72 | 20 km/h = 5.55556 m/s |
| 30 m/s | 108 | 30 km/h = 8.33333 m/s |
| 50 m/s | 180 | 50 km/h = 13.8889 m/s |
| 100 m/s | 360 | 100 km/h = 27.7778 m/s |
| 343 m/s | 1,234.8 | 343 km/h = 95.2778 m/s |
Did You Know?
The speed of light is exactly 299,792,458 meters per second — one of the few physical constants defined to be exact by international agreement.
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Conversion factors on this page are either exact by definition, derived from exact definitions, or conventional values in documented use. Each is listed with its source in our conversion methodology and sources, which cites the BIPM SI Brochure, NIST Special Publication 811 and the relevant IEC or national standards. Results are rounded for display only; calculations use full precision.