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.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
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 Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.