Speed conversion
Mile per hour to Kilometre per hour
One mile per hour is 1.609344 kilometres per hour. Enter any value below to convert it instantly, or use the reference table further down for the numbers you need most often.
Conversion rate
1 mph = 1.609344 km/h
km/h = mph × 1.609344
1 mph = 1.609344 km/h
Reference
Mile per hour to Kilometre per hour table
The values people look up most often, rounded for practical use.
| Mile per hour (mph) | Kilometre per hour (km/h) | Written out |
|---|---|---|
| 1 mph | 1.609344 km/h | 1 miles per hour = 1.609344 kilometres per hour |
| 2 mph | 3.218688 km/h | 2 miles per hour = 3.218688 kilometres per hour |
| 3 mph | 4.828032 km/h | 3 miles per hour = 4.828032 kilometres per hour |
| 5 mph | 8.04672 km/h | 5 miles per hour = 8.04672 kilometres per hour |
| 10 mph | 16.09344 km/h | 10 miles per hour = 16.09344 kilometres per hour |
| 15 mph | 24.14016 km/h | 15 miles per hour = 24.14016 kilometres per hour |
| 20 mph | 32.18688 km/h | 20 miles per hour = 32.18688 kilometres per hour |
| 25 mph | 40.2336 km/h | 25 miles per hour = 40.2336 kilometres per hour |
| 50 mph | 80.4672 km/h | 50 miles per hour = 80.4672 kilometres per hour |
| 100 mph | 160.934 km/h | 100 miles per hour = 160.934 kilometres per hour |
| 250 mph | 402.336 km/h | 250 miles per hour = 402.336 kilometres per hour |
| 500 mph | 804.672 km/h | 500 miles per hour = 804.672 kilometres per hour |
| 1,000 mph | 1,609.344 km/h | 1,000 miles per hour = 1,609.344 kilometres per hour |
How to convert miles per hour to kilometres per hour
Multiply the number of miles per hour by 1.609344. That is the whole calculation: km/h = mph × 1.609344. To go back the other way, divide instead, or multiply by 0.62137.
Worked example: 12 miles per hour × 1.609344 = 19.31213 kilometres per hour.
Where this conversion comes up
Speed conversion turns up when driving abroad, sailing or reading weather reports. A useful anchor: 100 km/h is about 62 mph, and a knot is one nautical mile per hour, which is slightly faster than a mile per hour.
Quick answers
- 1 mile per hour = 1.609344 kilometres per hour
- 2 miles per hour = 3.218688 kilometres per hour
- 5 miles per hour = 8.04672 kilometres per hour
- 10 miles per hour = 16.09344 kilometres per hour
- 100 miles per hour = 160.934 kilometres per hour
More conversions
Other speed conversions
Answers
Frequently asked questions
km/h = mph × 1.609344. The converter above applies it for you, but the formula is useful in a spreadsheet — put your value in column A and the formula in column B.Related tools
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