Health & fitness
Running pace and pace converter
Convert distance and time into min/km, min/mile, km/h, and mph.
Calculators / Conversions / Speed converter
Speed converter calculator
Convert kilometres per hour to mph and metres per second.
On this page
MPH62.14mph
m/s27.78m/s
KM/h100km/h
Calculator controls
How to calculate
Convert kilometres per hour to mph and metres per second.
1 mph = 1.609344 km/h; 1 m/s = 3.6 km/h.
Worked example
Speed: 100; Input unit: 1.
MPH: 62.14 mph; m/s: 27.78 m/s; KM/h: 100 km/h.
Assumptions and limits
Magnitude of speed; enter a nonnegative value.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
The displayed speeds are equivalent rates in miles per hour and metres per second. They do not describe acceleration.
When this tool is useful
Compare a vehicle or moving object’s speed across unit systems.
Understanding your inputs
| Input | What to enter |
|---|---|
| Speed | Enter a number of at least 0 and no more than 1000000000000. |
| Input unit | Enter one of the available options. |
Frequently asked questions
How do I convert km/h to m/s?
Divide by 3.6 because a kilometre is 1,000 metres and an hour is 3,600 seconds.
Does this determine travel time?
No. Travel time also needs a distance and an assumption about speed along the route.