M/S to MPH Converter
Convert metres per second to miles per hour — the physics unit into the everyday one. Results update as you type; exact factors shown.
One metre per second is 2.2369 miles per hour — see the exact factor, not a rounded rule of thumb.
How the m/s to mph 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 | 2.2369 mph | metre per second to miles per hour |
| 2 m/s | 4.4739 mph | metres per second to miles per hour |
| 5 m/s | 11.1847 mph | metres per second to miles per hour |
| 10 m/s | 22.3694 mph | metres per second to miles per hour |
| 15 m/s | 33.554 mph | metres per second to miles per hour |
| 20 m/s | 44.7387 mph | metres per second to miles per hour |
| 25 m/s | 55.9234 mph | metres per second to miles per hour |
| 30 m/s | 67.1081 mph | metres per second to miles per hour |
| 40 m/s | 89.4775 mph | metres per second to miles per hour |
| 50 m/s | 111.8468 mph | metres per second to miles per hour |
| 100 m/s | 223.6936 mph | metres per second to miles per hour |
| 343 m/s | 767.2691 mph | metres per second to miles 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 many mph is 1 m/s?
2.237 mph.
What is 10 m/s?
22.4 mph — roughly the top speed of a world-class sprinter.
How fast is the speed of sound?
About 343 m/s at 20°C, which is 767 mph.
How do I convert to km/h instead?
Multiply by 3.6.
Why do physicists use m/s?
Because it is the SI unit, so it combines cleanly with metres and seconds in every other formula.
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.