MPH to KPH
Convert miles per hour to kilometers per hour. One international mile is 1609.344 m, so 1 mph = 1.609344 km/h exactly. This is not a speed camera.
Rated 4.7 out of 5 based on 412 reviews
How to convert miles per hour to kilometers per hour
- Enter the speed in miles per hour. The default is 1.
- Keep From as Miles per hour and To as Kilometers per hour, or pick meters per second, feet per second, or knots.
- Read km/h. Multiply mph by 1.609344.
- Open kilometers per hour to miles per hour when you need the reverse default. Swap also reverses the pair on this page.
Mile per hour
International mile / hour
| Statute mile | 1 mi = 1609.344 m exactly |
|---|---|
| MPH to km/h | 1 mph = 1.609344 km/h exactly |
| Kilometer per hour | 1 km/h = 1000/3600 m/s |
| Knot | 1 knot = 1 nmi/h = 1.852 km/h |
| Meter per second | SI speed unit |
| Foot per second | 1 fps = 0.3048 m/s |
What mph to kph does
This spoke starts at miles per hour and targets kilometers per hour. The international mile is 1609.344 m, so dividing by 3600 s and converting to km/h yields the exact factor 1.609344. Sixty miles per hour is 96.56064 km/h. The pair page kph to mph defaults the other way.
Solve speed, distance, and time together on speed distance time. The speed hub is speed. Other dimensions sit on the unit converter.
Speed factors
km/h = mph × 1.609344. m/s = mph × 1609.344 / 3600. A knot is one nautical mile per hour. The nautical mile is 1852 m, so 1 knot = 1.852 km/h exactly. Feet per second use the international foot, 0.3048 m.
Road speed, knots, and cameras
Posted US limits are mph. Most of the world posts km/h. Aviation and marine logs often use knots, not mph. This page does not read a radar gun, a GPS track, or a posted limit sign. It only converts the number you type.
When to convert mph to km/h here
Translate a US speedometer figure for a metric dashboard, convert a forecast wind in mph, or check a knot against km/h. Keep pace per kilometer on the pace calculator.
What this page does not do
It is not a speed camera and it does not store a location. It does not convert pace (min/km). Input stays in this tab.