Speed / m/s → km/h
Convert Meters per second to Kilometers per hour
Convert linear speeds in metric, customary, and nautical units. Convert Meters per second (m/s) to Kilometers per hour (km/h). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Kilometers per hour to Meters per second →
How to convert meters per second to kilometers per hour
A knot is one international nautical mile (1852 meters) per hour. Mach is excluded because the speed of sound depends on the medium and conditions.
Use x for the value in m/s, b for the intermediate value in m/s, and y for the result in km/h.
km/h = m/s ÷ 0.2777777777777778
Worked examples
10 m/s ≈ 36 km/h
Step 1: (10 × 1) ≈ 10 m/s.
Step 2: 10 ÷ 0.277777777778 ≈ 36 km/h.20 m/s ≈ 72 km/h
Step 1: (20 × 1) ≈ 20 m/s.
Step 2: 20 ÷ 0.277777777778 ≈ 72 km/h.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Meters per second
Meters per second (m/s) measures speed under the conventions above. The base value in m/s is (x × 1), where x is the numerical value in m/s. Factors shown here are rounded for display; calculations use the stored factor.
About Kilometers per hour
Kilometers per hour (km/h) measures speed under the conventions above. The base value in m/s is (x × 0.277777777778), where x is the numerical value in km/h. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Meters per second to kilometers per hour reference table
| Meters per second (m/s) | Kilometers per hour (km/h) |
|---|---|
| 1 | 3.6 |
| 5 | 18 |
| 10 | 36 |
| 25 | 90 |
| 50 | 180 |
| 100 | 360 |
| 1000 | 3600 |
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