Kilometers per hour to miles per hour (km/h to mph)
The answer, the exact formula and a table with the values people look up most.
1 km/h = 0.621371 mph1 mph = 1.60934 km/hMiles per hour = Kilometers per hour ÷ 1.609344Example: 90 km/h = 55.9234 mph
1 km/h = 0.6213711922 mph
Conversions people ask for most
Convert kilometers per hour to miles per hour
| km/h | mph |
|---|---|
| 10 km/h | 6.2137 mph |
| 20 km/h | 12.427 mph |
| 30 km/h | 18.641 mph |
| 40 km/h | 24.855 mph |
| 50 km/h | 31.069 mph |
| 60 km/h | 37.282 mph |
| 70 km/h | 43.496 mph |
| 80 km/h | 49.71 mph |
| 90 km/h | 55.923 mph |
| 100 km/h | 62.137 mph |
| 110 km/h | 68.351 mph |
| 120 km/h | 74.565 mph |
| 130 km/h | 80.778 mph |
| 150 km/h | 93.206 mph |
| 200 km/h | 124.27 mph |
| 300 km/h | 186.41 mph |
The factor is exact: it comes from the official definition of the units. The table rounds to a few decimals; the converter above gives up to 10 significant digits.
The two units
Kilometer per hour km/h
Kilometers per hour is the speed unit on road signs in most countries.
Mile per hour mph
Miles per hour is the speed unit on road signs in the United States and the United Kingdom.
Frequently asked questions
How many miles per hour are 90 kilometers per hour?
90 km/h = 55.9234 mph.
What is the formula to convert kilometers per hour to miles per hour?
Miles per hour = Kilometers per hour ÷ 1.609344. 90 km/h = 55.9234 mph.
Is this conversion exact?
Yes. The factor comes from the international definition of both units, so the only difference you may see is rounding.