KM/H to MPH Converter

Convert from Value

km/h-

mph-

m/s-

knots-

How it works

1 mile per hour is exactly 1.609344 km/h, so multiply km/h by 0.621371 to get mph, and multiply mph by 1.609344 to get km/h. One metre per second is 3.6 km/h, and one knot (one nautical mile per hour) is 1.852 km/h.

Quick reference

km/h	mph	m/s

FAQ

How do I convert km/h to mph?

Multiply by 0.621371. 100 km/h × 0.621371 = 62.14 mph. A rough mental shortcut is to take 60% of the km/h figure.

How do I convert mph to km/h?

Multiply by 1.609344. 60 mph × 1.609344 = 96.56 km/h. A rough shortcut: add half, then a tenth (60 + 30 + 6 = 96).

How fast is 120 km/h in mph?

120 km/h is about 74.6 mph.

How do I convert m/s to km/h?

Multiply by 3.6. 10 m/s = 36 km/h.

See also: Km to Miles · Miles to Km · MPG to L/100km