Convert mile per hour to kilometer per hour
Here you can quickly calculate how many kilometer per hour fit in one mile per hour.
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- 1 mph = 1.609344 km/h
- 1 km/h = 0.621371 mph
Example: mile per hour to kilometer per hour
- 1 mile per hour = 1.609344 kilometer per hour
Mile per hour to kilometer per hour conversion table
| mile per hour | kilometer per hour |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 50 | 80.4672 |
| 100 | 160.9344 |
Mile per hour to kilometer per hour formula
To convert mile per hour to kilometer per hour, multiply by 1.609344.
1 mph = 1.609344 km/h
Example: 1 mile per hour = 1.609344 kilometer 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 mile per hour and kilometer per hour conversion quiz
Score:
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3.4 mile per hour equals 5.47 kilometer per hour.
Correct answer: 3.4 mile per hour = 5.47 kilometer per hour.
101 kilometer per hour equals 56.5 mile per hour.
Correct answer: 101 kilometer per hour = 62.8 mile per hour.
11 kilometer per hour equals 6.84 mile per hour.
Correct answer: 11 kilometer per hour = 6.84 mile per hour.
242 mile per hour equals 331 kilometer per hour.
Correct answer: 242 mile per hour = 389 kilometer per hour.
49 kilometer per hour equals 30.4 mile per hour.
Correct answer: 49 kilometer per hour = 30.4 mile per hour.