Convert Kilometers per hour to miles per hour

When you need this conversion

Driving abroad is the main reason — a rental car in Europe shows km/h while the driver thinks in mph, and vice versa. It also comes up in sports, where pitch speeds, tennis serves, and cycling paces get reported in different units by different broadcasters.

Kilometers per hour to miles per hour conversion table

The formula

Because both units measure speed, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.

Related speed conversions

• Kilometers per hour to knots
• Knots to kilometers per hour
• Meters per second to miles per hour
• Kilometers per hour to meters per second
• Kilometers per hour to feet per second
• Kilometers per hour to mach
• Feet per second to miles per hour
• Knots to miles per hour
• Mach to miles per hour
• Meters per second to kilometers per hour
• Meters per second to feet per second
• Meters per second to knots

Frequently asked questions

How many miles per hour are in a kilometer per hour?

There are 0.621371 miles per hour in 1 kilometer per hour. The formula is mph = km/h ÷ 1.609344.

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

Use the formula mph = km/h ÷ 1.609344. For example, 10 kilometers per hour equals 6.2137 miles per hour.

Is the kilometers per hour to miles per hour conversion exact?

Yes. Kilometers per hour and miles per hour are both units of speed, related by an exact defined factor. Displayed results are rounded for readability.

What is km/h short for?

km/h is the standard symbol for kilometer per hour (also written as kmh, kph). mph is the symbol for mile per hour.