This mph to kmh converter turns miles per hour into kilometers per hour as you type. US and UK road signs, American car reviews, baseball pitch speeds and treadmill displays use mph; most of the rest of the world reads speed in km/h. It runs in your browser and spends no credits.
How many km/h is 1 mph
One mile per hour is exactly 1.609344 km/h, because a mile is exactly 1.609344 km and both speeds are per hour. That means 60 mph is 96.56 km/h, a little short of 100.
Mph to km/h formula
Multiply the mph by 1.609344:
km/h = mph × 1.609344
For a quick estimate, multiply by 1.6, or add 60 percent: 50 mph becomes 80 km/h, against an exact 80.47 km/h. At highway speeds the shortcut stays within about one km/h.
US speed limits in km/h
| Mph | Km/h |
|---|---|
| 5 mph | 8.05 km/h |
| 10 mph | 16.09 km/h |
| 15 mph | 24.14 km/h |
| 20 mph | 32.19 km/h |
| 25 mph | 40.23 km/h |
| 30 mph | 48.28 km/h |
| 35 mph | 56.33 km/h |
| 40 mph | 64.37 km/h |
| 45 mph | 72.42 km/h |
| 55 mph | 88.51 km/h |
| 60 mph | 96.56 km/h |
| 65 mph | 104.61 km/h |
| 70 mph | 112.65 km/h |
| 75 mph | 120.70 km/h |
| 80 mph | 128.75 km/h |
Worked example: a visitor on a US highway
A driver used to km/h picks up a car in the US and sees a 65 mph sign. 65 × 1.609344 = 104.61 km/h, roughly the 100 km/h they know from home. A 25 mph school or residential zone is 40.23 km/h, and a 70 mph interstate is 112.65 km/h. The rental’s speedometer may show both scales; when it doesn’t, a glance at this table helps.
Mph beyond the road
The same factor applies anywhere mph appears. A 100 mph fastball is 160.93 km/h. A treadmill set to 6 mph is 9.66 km/h, a 10 minute mile pace. Wind speeds in US forecasts are in mph too, and for sailing you can pick knots in the unit list.
FAQ
Is 60 mph 100 km/h?
No. 60 mph is 96.56 km/h. 100 km/h is 62.14 mph.
Is mph faster than km/h?
A mile is longer than a kilometer, so the same number in mph is a higher speed: 50 mph is faster than 50 km/h.
What does it cost?
It comes with the Nexin library: Nexin Lite or Nexin Pro opens it, and it spends no credits.
