Convert kilometer per hour to mile per hour
Here you can quickly calculate how many mile per hour fit in one kilometer per hour.
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- 1 km/h = 0.621371 mph
- 1 mph = 1.609344 km/h
Example: kilometer per hour to mile per hour
- 1 kilometer per hour = 0.621371 mile per hour
Kilometer per hour to mile per hour conversion table
| kilometer per hour | mile per hour |
|---|---|
| 1 | 0.621371 |
| 2 | 1.242742 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 20 | 12.427424 |
| 50 | 31.06856 |
| 100 | 62.137119 |
Kilometer per hour to mile per hour formula
To convert kilometer per hour to mile per hour, multiply by 0.621371.
1 km/h = 0.621371 mph
Example: 1 kilometer per hour = 0.621371 mile per hour
Common speed conversion mistakes
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A knot is one nautical mile per hour, exactly 1.852 km/h, not 1 km/h. A boat doing 20 knots travels at about 37 km/h. Multiply knots by 1.852 to get km/h.
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Between m/s and km/h the factor is 3.6, an hour has 3,600 seconds and a kilometer 1,000 meters. Multiply m/s by 3.6 to get km/h (10 m/s = 36 km/h) and divide going the other way. Flipping the factor produces a thirteen-fold error.
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UK and US road signs show miles per hour, not km/h. 1 mph is about 1.609 km/h, so a '70' limit means about 113 km/h. Multiply mph by 1.6 to think in km/h.
Quick kilometer per hour and mile per hour conversion quiz
Score:
0
6 mile per hour equals 8.21 kilometer per hour.
Correct answer: 6 mile per hour = 9.66 kilometer per hour.
15.2 kilometer per hour equals 9.44 mile per hour.
Correct answer: 15.2 kilometer per hour = 9.44 mile per hour.
4 kilometer per hour equals 2.49 mile per hour.
Correct answer: 4 kilometer per hour = 2.49 mile per hour.
122 kilometer per hour equals 75.8 mile per hour.
Correct answer: 122 kilometer per hour = 75.8 mile per hour.
218 kilometer per hour equals 156 mile per hour.
Correct answer: 218 kilometer per hour = 135 mile per hour.