Speed
Miles per hour to metres per second
Two factors are needed here because both the distance unit and the time unit change. The chain collapses to 0.44704 m/s per mph, or to dividing kph by 3.6.
The Formula
m/s = mph x 1609.344 / 3600 = kph / 3.6
Two factors are needed here because both the distance unit and the time unit change. The chain collapses to 0.44704 m/s per mph, or to dividing kph by 3.6.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| mph | Speed in miles per hour | miles per hour | The starting unit before any conversion. |
| 1609.344 / 3600 | Metres per second in one mile per hour | dimensionless | Equals 0.44704, the metres-per-second value of 1 mph. |
| m/s | Speed in metres per second | metres per second | 60 mph is 26.822400000000002 m/s, the same as 96.56064 / 3.6. |
What Each Symbol Means
mphmiles per hour
Speed in miles per hour
The starting unit before any conversion.
1609.344 / 3600dimensionless
Metres per second in one mile per hour
Equals 0.44704, the metres-per-second value of 1 mph.
m/smetres per second
Speed in metres per second
60 mph is 26.822400000000002 m/s, the same as 96.56064 / 3.6.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to convert mph to kph page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Convert Mph To Kph, filed under Unit Conversion. Every number the guide produces comes from substituting into this one line.