Speed conversion
4 units, with m/s as the base. Every value in the factor table is the number you multiply by, so reading across a row converts out of that unit and reading down a column converts into it.
Factor table
| from \ to | m/s | km/h | mph | ft/s |
|---|---|---|---|---|
| m/s | 1 | 3.6 | 2.23694 | 3.28084 |
| km/h | 0.277778 | 1 | 0.621371 | 0.911344 |
| mph | 0.44704 | 1.60934 | 1 | 1.46667 |
| ft/s | 0.3048 | 1.09728 | 0.681818 | 1 |
The values are facts and free to use; this table’s selection and presentation are © 2026 ScienceQuest.
Common conversions
mph to km/h
1 mph = 1.60934 km/h. In reverse, 1 km/h = 0.621371 mph.
| mph | km/h |
|---|---|
| 1 | 1.60934 |
| 5 | 8.04672 |
| 10 | 16.0934 |
| 50 | 80.4672 |
| 100 | 160.934 |
| 500 | 804.672 |
m/s to km/h
1 m/s = 3.6 km/h. In reverse, 1 km/h = 0.277778 m/s.
| m/s | km/h |
|---|---|
| 1 | 3.6 |
| 5 | 18 |
| 10 | 36 |
| 50 | 180 |
| 100 | 360 |
| 500 | 1800 |
Worked example
- 1 mph in km/h
- = 1 × 1.60934
- = 1.60934 km/h
Convert a number
The table gives the factor; the unit converter does the arithmetic, remembers the units you picked, and turns any conversion into a link you can share.
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