Meters per Second to km/h Converter
Convert meters per second to kilometers per hour — multiply by 3.6. Results update as you type; exact factors shown.
One meter per second is 3.6 kilometer per hour — see the exact factor, not a rounded rule of thumb.
How the meters per second to km/h converter works
Speeds convert through meters per second. 1 km/h is 1000/3600 m/s; 1 mph is 1609.344/3600 m/s; a knot is one nautical mile (1,852 m) per hour. Mach is shown against the standard sea-level speed of sound of 340.29 m/s and varies with altitude and temperature.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common speed conversions
| From | To | Units |
|---|---|---|
| 1 m/s | 3.6 km/h | meter per second to kilometer per hour |
| 2 m/s | 7.2 km/h | meter per second to kilometer per hour |
| 5 m/s | 18 km/h | meter per second to kilometer per hour |
| 8.33 m/s | 29.988 km/h | meter per second to kilometer per hour |
| 10 m/s | 36 km/h | meter per second to kilometer per hour |
| 13.89 m/s | 50.004 km/h | meter per second to kilometer per hour |
| 15 m/s | 54 km/h | meter per second to kilometer per hour |
| 20 m/s | 72 km/h | meter per second to kilometer per hour |
| 27.78 m/s | 100.008 km/h | meter per second to kilometer per hour |
| 30 m/s | 108 km/h | meter per second to kilometer per hour |
| 50 m/s | 180 km/h | meter per second to kilometer per hour |
| 100 m/s | 360 km/h | meter per second to kilometer per hour |
Units in this converter and their exact factors
| Unit | Symbol | One unit in meter per seconds |
|---|---|---|
| meter per second | m/s | 1 meter per second |
| kilometer per hour | km/h | 0.2777777778 meter per second |
| mile per hour | mph | 0.44704 meter per second |
| knot | kn | 0.5144444444 meter per second |
| foot per second | ft/s | 0.3048 meter per second |
| Mach (sea level, 15 °C) | Ma | 340.29 meter per second |
FAQFrequently asked questions about speed conversion
How do I convert m/s to km/h?
Multiply by 3.6 — there are 3,600 seconds in an hour and 1,000 meters in a kilometer.
What is 10 m/s?
36 km/h.
What is 100 km/h in m/s?
27.78 m/s.
Why does physics use m/s?
Because it is the SI unit, and every equation involving speed expects base units.
What is a fast human sprint?
About 10 to 12 m/s at peak, which is 36 to 43 km/h.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.