Speed Converter

Convert kilometers per hour, miles per hour, meters per second, knots and feet per second.

About this converter

Road speeds are shown in km/h or mph depending on the country, physics uses meters per second, and aviation and sailing use knots (one nautical mile per hour, exactly 1.852 km/h).

Common kilometers per hour to miles per hour conversions

To convert kilometers per hour to miles per hour, multiply by 0.621371. To go back, divide by the same number (or multiply by 1.60934).

Value	Kilometers per hour → Miles per hour	Miles per hour → Kilometers per hour
1	1 km/h = 0.621371 mph	1 mph = 1.60934 km/h
2	2 km/h = 1.24274 mph	2 mph = 3.21869 km/h
5	5 km/h = 3.10686 mph	5 mph = 8.04672 km/h
10	10 km/h = 6.21371 mph	10 mph = 16.0934 km/h
20	20 km/h = 12.4274 mph	20 mph = 32.1869 km/h
50	50 km/h = 31.0686 mph	50 mph = 80.4672 km/h
100	100 km/h = 62.1371 mph	100 mph = 160.934 km/h
1,000	1,000 km/h = 621.371 mph	1,000 mph = 1,609.34 km/h

Frequently asked questions

How many mph is 100 km/h?

100 km/h is about 62.14 mph.

How fast is 1 m/s in km/h?

1 m/s is exactly 3.6 km/h.