Convert Miles per hour to kilometers 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.

Miles per hour to kilometers 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

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

Frequently asked questions

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

There are 1.6093 kilometers per hour in 1 mile per hour. The formula is km/h = mph × 1.609344.

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

Use the formula km/h = mph × 1.609344. For example, 10 miles per hour equals 16.0934 kilometers per hour.

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

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

What is mph short for?

mph is the standard symbol for mile per hour. km/h is the symbol for kilometer per hour.