Kilometres per hour to Miles per hour
Convert kilometres per hour (km/h) to miles per hour (mph) instantly — with formula and reference table.
Quick answer: 1 km/h = 0.621371 mph. To convert kilometres per hour to miles per hour, multiply by km/h × 0.621371.
Converting kilometres per hour to miles per hour
This converter changes a value in kilometres per hour (km/h) into miles per hour (mph). One kilometres per hour equals 0.621371 mph. To convert km/h to mph, multiply by 0.621371. This is the same factor used to convert kilometres to miles. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
mph = km/h × 0.621371
Example
Convert 10 km/h to mph: 10 × 0.621371 = 6.213712 mph.
Kilometres per hour to Miles per hour conversion table
| Kilometres per hour (km/h) | Miles per hour (mph) |
|---|---|
| 1 km/h | 0.621371 mph |
| 2 km/h | 1.242742 mph |
| 3 km/h | 1.864114 mph |
| 5 km/h | 3.106856 mph |
| 10 km/h | 6.213712 mph |
| 20 km/h | 12.427424 mph |
| 25 km/h | 15.53428 mph |
| 50 km/h | 31.06856 mph |
| 100 km/h | 62.137119 mph |
How to use this converter
- Enter a value in the kilometres per hour (km/h) field.
- Read the converted value in miles per hour (mph) below.
- Type into the mph field instead to convert in reverse, or use the swap button.
Frequently asked questions
How do I convert km/h to mph?
Multiply the speed in km/h by 0.621371. 100 km/h = 62.14 mph.
What is 120 km/h in mph?
120 × 0.621371 = 74.56 mph.
How can I estimate km/h to mph in my head?
Multiply by 0.6 for a quick low estimate, then add a little. 100 km/h ≈ 60 mph (actually 62).