Metres per Second to km/h Converter
Convert metres per second to kilometres per hour — multiply by 3.6. Results update as you type; exact factors shown.
One metre per second is 3.6 kilometres per hour — see the exact factor, not a rounded rule of thumb.
How the metres per second to km/h converter works
Speeds convert through metres 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.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common speed conversions
| From | To | Units |
|---|---|---|
| 1 m/s | 3.6 km/h | metre per second to kilometres per hour |
| 2 m/s | 7.2 km/h | metres per second to kilometres per hour |
| 5 m/s | 18 km/h | metres per second to kilometres per hour |
| 8.33 m/s | 29.988 km/h | metres per second to kilometres per hour |
| 10 m/s | 36 km/h | metres per second to kilometres per hour |
| 13.89 m/s | 50.004 km/h | metres per second to kilometres per hour |
| 15 m/s | 54 km/h | metres per second to kilometres per hour |
| 20 m/s | 72 km/h | metres per second to kilometres per hour |
| 27.78 m/s | 100.008 km/h | metres per second to kilometres per hour |
| 30 m/s | 108 km/h | metres per second to kilometres per hour |
| 50 m/s | 180 km/h | metres per second to kilometres per hour |
| 100 m/s | 360 km/h | metres per second to kilometres per hour |
Units in this converter and their exact factors
| Unit | Symbol | One unit in metre per seconds |
|---|---|---|
| metre per second | m/s | 1 metre per second |
| kilometre per hour | km/h | 0.2777777778 metre per second |
| mile per hour | mph | 0.44704 metre per second |
| knot | kn | 0.5144444444 metre per second |
| foot per second | ft/s | 0.3048 metre per second |
| Mach (sea level, 15 °C) | Ma | 340.29 metre 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 metres in a kilometre.
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 Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.