Unit converter
Miles Per Hour to Meters Per Second Converter
Convert miles per hour to metres per second for engineering checks, physics homework, wind loading, vehicle testing, and sports timing. The exact factor is 0.44704, so 1 mph is 0.44704 m/s. Miles per hour are familiar on UK and US roads, while metres per second fit SI calculations where distance is in metres and time is in seconds. This page is useful when a car speed, treadmill display, weather report, or race split has to feed into a formula using SI units.
1 mile per hour = 0.44704 meters per second
Common miles per hour to meters per second values
| Miles per hour | Meters per second |
|---|---|
| 1 mph | 0.44704 m/s |
| 2 mph | 0.89408 m/s |
| 5 mph | 2.2352 m/s |
| 10 mph | 4.4704 m/s |
| 20 mph | 8.9408 m/s |
| 50 mph | 22.352 m/s |
| 100 mph | 44.704 m/s |
How to convert
- Enter the speed in miles per hour.
- Multiply the mph value by 0.44704 to get metres per second.
- The factor is direct from the unit table because 1 mph has a base speed value of 0.44704 m/s.
- To move from m/s back to mph, divide by 0.44704.
- For quick estimating, halve the mph value and subtract about 10 percent: 60 mph is close to 27 m/s, and 30 mph is close to 13.5 m/s.
m/s = mph * 0.44704
The conversion engine uses metres per second as the base speed unit. A mile per hour has a base factor of 0.44704, so each mph contributes 0.44704 metres per second. Multiplying the mph value by 0.44704 gives the SI speed directly.
- mph
- the speed in miles per hour
- 0.44704
- metres per second in one mile per hour
Worked example
A car travelling at 70 mph is 70 multiplied by 0.44704, which equals 31.2928 m/s. A 20 mph urban speed limit is 8.9408 m/s, which can be useful for stopping-distance models or sensor timing calculations.
Key facts
- 1 mph is 0.44704 m/s.
- 30 mph is 13.4112 m/s.
- 60 mph is 26.8224 m/s.
- 70 mph is 31.2928 m/s.
Tips
- For mental work, use mph divided by 2.24 when that feels easier than multiplying by 0.44704.
- Keep metres per second for later physics steps, especially if acceleration or kinetic energy is involved.
- Round only at the final presentation stage when a model depends on several converted speeds.
Frequently asked questions
How many m/s are in 1 mph?+
There are exactly 0.44704 metres per second in 1 mile per hour according to the unit factors used here.
Why convert mph into m/s?+
Many formulae in mechanics, aerodynamics, and data logging use metres and seconds, so the speed must be in m/s before it is combined with SI values.
How fast is 60 mph in metres per second?+
60 mph is 26.8224 m/s. That rounded value is often used when comparing motorway speeds with physics examples.
Can I use 0.45 as a shortcut?+
0.45 is a fair estimate for quick checks, but 0.44704 is the exact factor used by this calculator and should be used for reported results.
Things to watch
- A rounded road-speed conversion can shift timing results in simulations, especially over long distances.
- Do not confuse metres per second with kilometres per hour; 1 mph is 0.44704 m/s but about 1.609 km/h.
Sources
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.