Quick Answer: Kilometers per Hour to Meters per Second
One kilometer per hour is approximately 0.2778 meters per second (1 km/h ≈ 0.2778 m/s).
Conversely, 1 m/s = 3.6 km/h.
Formula: m/s = km/h ÷ 3.6
Worked examples
- 10 km/h ≈ 2.778 m/s
- 20 km/h ≈ 5.556 m/s
- 36 km/h = 10 m/s
Method and limitations
Divide kilometers per hour by 3.6. 1 km/h = 1,000 m ÷ 3,600 s = 0.2777… m/s (5/18 m/s), derived from the exact 3.6 relationship. Calculations use full-precision constants; answers in this box are rounded for readability (≈ marks a rounded value) and the calculator shows up to 9 significant figures.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
Divide kilometers per hour by 3.6. 1 km/h = 1,000 m ÷ 3,600 s = 0.2777… m/s (5/18 m/s), derived from the exact 3.6 relationship.
Complete Guide to Kilometers per Hour to Meters per Second Conversion
What is a kilometer per hour?
Kilometers per hour (km/h) is distance in kilometers per hour.
What is a meter per second?
Meters per second (m/s) is the SI unit of speed, used directly in physics formulas.
How the Conversion Works
m/s = km/h ÷ 3.6 = km/h × 5/18.
Step-by-Step Conversion Guide
Follow these steps to convert kilometers per hour to meters per second manually:
Start with your value in kilometers per hour
Example: You want to convert 36 km/h
Apply the conversion formula
Use the formula: m/s = km/h ÷ 3.6
Calculate the result
36 km/h = 10 m/s
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
Divide by 4 and add 10%: 72 km/h ≈ 18 + 1.8 = 19.8 m/s (exact 20).
Common Conversions
| Kilometers per Hour (km/h) | Meters per Second (m/s) | Meters per Second → Kilometers per Hour |
|---|---|---|
| 10 km/h | 2.77778 | 10 m/s = 36 km/h |
| 20 km/h | 5.55556 | 20 m/s = 72 km/h |
| 36 km/h | 10 | 36 m/s = 129.6 km/h |
| 50 km/h | 13.8889 | 50 m/s = 180 km/h |
| 72 km/h | 20 | 72 m/s = 259.2 km/h |
| 100 km/h | 27.7778 | 100 m/s = 360 km/h |
| 120 km/h | 33.3333 | 120 m/s = 432 km/h |
| 200 km/h | 55.5556 | 200 m/s = 720 km/h |
| 300 km/h | 83.3333 | 300 m/s = 1,080 km/h |
| 1000 km/h | 277.778 | 1000 m/s = 3,600 km/h |
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.
Popular Kilometers per Hour to Meters per Second Conversions
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When You'll Need This Conversion
Motion calculations
Distance travelled in 2 s at 100 km/h: 27.78 m/s × 2 = 55.56 m.
Wind given in km/h
A 54 km/h gust is 15 m/s for tools that expect SI.
Common Mistakes to Avoid
Rounding 1/3.6 to 0.28 early
0.28 overstates by 0.8%.
Divide by 3.6 exactly.
Frequently Asked Questions
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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.