How do I convert miles per hour to kilometers per hour?

Multiply the number of miles per hour by 1.609344. For example, 5 mph = 8.04672 km/h.

How many kilometers per hour are in one mile per hour?

One mile per hour equals 1.609344 kilometers per hour.

12 miles per hour equals 19.3121 kilometers per hour.

Use the reverse Kilometers per hour to Miles per hour converter: multiply kilometers per hour by 0.6213711922.

Convert miles per hour (mph) to kilometers per hour (km/h) instantly — type a value below.

1 mile per hour (mph) = 1.609344 kilometers per hour (km/h)
1 kilometer per hour (km/h) = 0.6213711922 miles per hour (mph)

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To convert miles per hour to kilometers per hour, use this formula:

km/h = mph × 1.609344 (or divide by 0.6213711922)

Miles per hour is the road speed unit in the United States and the United Kingdom. 1 mph is exactly 0.44704 m/s.

Kilometers per hour is the unit for road speed limits and car speedometers in most of the world. 1 km/h = 1/3.6 m/s.

How do I convert miles per hour to kilometers per hour?: Multiply the number of miles per hour by 1.609344. For example, 5 mph = 8.04672 km/h.
How many kilometers per hour are in one mile per hour?: One mile per hour equals 1.609344 kilometers per hour.
What is 12 mph in kilometers per hour?: 12 miles per hour equals 19.3121 kilometers per hour.
How do I convert kilometers per hour back to miles per hour?: Use the reverse Kilometers per hour to Miles per hour converter: multiply kilometers per hour by 0.6213711922.

Need other units? Use the full speed converter.