Miles Per Hour to Meters Per Second
An instant miles per hour-to-meters per second converter, with the formula and a reference table below.
| Miles Per Hour | Meters Per Second |
|---|---|
| 1 mph | 0.44704 m/s |
| 2 mph | 0.89408 m/s |
| 3 mph | 1.34112 m/s |
| 5 mph | 2.2352 m/s |
| 10 mph | 4.4704 m/s |
| 25 mph | 11.176 m/s |
| 50 mph | 22.352 m/s |
| 100 mph | 44.704 m/s |
How to use
- Enter a value in the Miles Per Hour field.
- The Meters Per Second figure appears immediately — no button to press.
- Typing in the Meters Per Second field converts back to Miles Per Hour the same way.
- Use the reference table for the values that come up most often.
Miles Per Hour to Meters Per Second formula
To convert miles per hour to meters per second, multiply by 0.44704.
m/s = mph × 0.44704
Why this factor: the mile per hour and the meter per second are both defined against the meter per second, so dividing one definition by the other gives 0.44704 directly. Both definitions are set out in full below.
To go the other way, divide by 0.44704 — or use the Meters Per Second to Miles Per Hour converter, which is the same calculation reversed.
Worked example
Given 30 mph, multiplying by 0.44704 yields 13.4112 m/s.
30 mph × 0.44704 = 13.4112 m/s
The converter above does this for any value you type, in either direction.
What is a mile per hour?
Miles per hour is the road speed unit of the United States and the United Kingdom.
Definition: Exactly 0.44704 meters per second, following from the exact 1,609.344 m mile.
Where it is used: US and UK speed limits and speedometers, plus baseball pitch and tennis serve speeds.
What is a meter per second?
Meters per second is the SI unit of speed, and the one physics equations expect.
Definition: Derived directly from the meter and the second.
Where it is used: Physics and engineering calculations, wind speed in meteorology, and sound and projectile velocities.
Miles Per Hour vs Meters Per Second
The mile per hour is an imperial unit while the meter per second is an SI unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many meters per second are in a mile per hour?
One mile per hour equals 0.44704 meters per second.
What is the formula to convert miles per hour to meters per second?
Multiply the number of miles per hour by 0.44704. To reverse it, divide by 0.44704 instead.
How do I convert meters per second back to miles per hour?
Divide by 0.44704, which is the same as multiplying by 2.23693629.
How many meters per second are in 10 miles per hour?
10 mph works out to 4.4704 m/s.
How is the mile per hour defined?
Exactly 0.44704 meters per second, following from the exact 1,609.344 m mile.