Miles per hour.
mph to m/s Converter — mph to m/s
Convert mph (mph) to m/s (m/s) using the exact conversion factor (1 mph = 0.44704 m/s). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
mph to m/s converter
Converter
Speed Converter
Convert road, aviation, marine, lab, and scientific speed units.
Context values
Some unit families need one extra value for a physically accurate result.
Meters per second.
Result = input x 0.44704 / 1.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting mph to m/s
mph and m/s both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). mph is typically associated with united States (road speed limits and vehicle speedometers), while m/s is typically associated with standard scientific speed unit worldwide.
Formula
m/s = mph × 0.44704
This factor comes from each unit's defined relationship to the category's base unit: 1 mph equals 0.44704 base units, and 1 m/s equals 1 base unit, so dividing one by the other gives the direct mph-to-m/s factor of 0.44704.
Simple example
1 mph × 0.44704 = 0.44704 m/s
1 mph = 0.44704 m/s.
Real-world example
10 mph × 0.44704 = 4.4704 m/s
10 mph = 4.4704 m/s.
Conversion table
| mph (mph) | m/s (m/s) |
|---|---|
| 1 mph | 0.44704 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 |
Reverse conversion: m/s to mph
0.44704 m/s × 2.236936292 = 1 mph
0.44704 m/s = 1 mph.
mph = m/s × 2.23693629205
For a page dedicated to this direction, see m/s to mph.
mph vs. m/s
| Aspect | mph | m/s |
|---|---|---|
| Family | US/imperial customary unit | SI derived unit |
| Typical use | Road speed limits and vehicle speedometers in the US and UK | Scientific and engineering speed/velocity calculations |
| Where it's used | United States (road speed limits and vehicle speedometers) | Standard scientific speed unit worldwide |
Understanding the mph
mph (mph) measures speed. Miles per hour follows directly from the international statute mile (1,609.344 m) divided by one hour. It is classified as a US/imperial customary unit.
Where it's used: United States (road speed limits and vehicle speedometers) United Kingdom (road speed limits)
Uses of the mph today
- Road speed limits and vehicle speedometers in the US and UK
- Weather reporting (wind speed) in the US
- Sports statistics (e.g. pitch speed, wind gusts) in US media
History of the mph
Miles per hour is a compound unit with no separate origin story of its own — it follows automatically once the statute mile was fixed at 5,280 feet in 1593 and later refined to exactly 1,609.344 meters by the 1959 international agreement that also standardized the pound.
Historical origin. mph was not the invention of a single named person; it developed through the process described above.
Understanding the m/s
m/s (m/s) measures speed. The meter per second is the SI derived unit of speed: one meter of distance per second of time. It is classified as a SI derived unit.
Where it's used: Standard scientific speed unit worldwide
Uses of the m/s today
- Scientific and engineering speed/velocity calculations
- Meteorology (wind speed, alongside km/h and knots)
- Physics education and calculations
History of the m/s
As a coherent SI derived unit, meters per second follows automatically from the meter and second, the SI base units of length and time, without an independent historical origin.
Historical origin. m/s was not the invention of a single named person; it developed through the process described above.
mph — sources
- NIST — International yard and pound (1959) — Basis for the modern mile used in mph.
m/s — sources
- BIPM SI Brochure — Coherent derived units — Defines m/s as the SI unit of speed.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many m/s are in 1 mph?
1 mph equals 0.44704 m/s, using the exact defined conversion factor rather than an estimate.
How do I convert mph to m/s?
Multiply the mph value by 0.44704. The converter above does this instantly to whatever precision you set.
How do I convert m/s back to mph?
Use the reverse factor: 1 m/s equals 2.236936292 mph. You can also use the swap control in the converter above to flip the direction instantly.
What is a mph?
mph (mph) measures speed. Miles per hour follows directly from the international statute mile (1,609.344 m) divided by one hour. It is classified as a US/imperial customary unit.
What is a m/s?
m/s (m/s) measures speed. The meter per second is the SI derived unit of speed: one meter of distance per second of time. It is classified as a SI derived unit.
Is the mph to m/s conversion exact?
Yes. Both mph and m/s are defined by fixed standards rather than physical artifacts, so the factor of 0.44704 used above is exact to as many digits as you choose to display.
Where is the mph still used today?
United States (road speed limits and vehicle speedometers) United Kingdom (road speed limits)