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Convert kilometer per hour to mile per hour

Here you can quickly calculate how many mile per hour fit in one kilometer per hour.
write a number and we convert instantly
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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

  • 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.
  • 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.
  • 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

191 mile per hour equals 277 kilometer per hour.

Correct answer: 191 mile per hour = 307 kilometer per hour.

227 kilometer per hour equals 162 mile per hour.

Correct answer: 227 kilometer per hour = 141 mile per hour.

13.4 mile per hour equals 21.6 kilometer per hour.

Correct answer: 13.4 mile per hour = 21.6 kilometer per hour.

101 mile per hour equals 138 kilometer per hour.

Correct answer: 101 mile per hour = 163 kilometer per hour.

More speed conversions