Kilometres per Hour to Miles per Hour
Type a value in kilometres per hour to see it in miles per hour. It works both ways: type in the miles per hour box to convert back.
Formula
To convert kilometres per hour to miles per hour, divide by 1.609344 (the same as multiplying by 0.6213711922).
1 km/h = 0.621371192237 mph and 1 mph = 1.609344 km/h.
Kilometres per hour to miles per hour table
| Kilometres per hour | Miles per hour |
|---|---|
| 10 km/h | 6.213712 mph |
| 20 km/h | 12.42742 mph |
| 30 km/h | 18.64114 mph |
| 50 km/h | 31.06856 mph |
| 60 km/h | 37.28227 mph |
| 80 km/h | 49.7097 mph |
| 90 km/h | 55.92341 mph |
| 100 km/h | 62.13712 mph |
| 110 km/h | 68.35083 mph |
| 120 km/h | 74.56454 mph |
| 130 km/h | 80.77825 mph |
| 160 km/h | 99.41939 mph |
| 200 km/h | 124.2742 mph |
Worked examples
20 km/h in miles per hour
20 km/h
12.42742 mph
20 × 0.6213711922 = 12.42742384
90 km/h in miles per hour
90 km/h
55.92341 mph
90 × 0.6213711922 = 55.9234073
160 km/h in miles per hour
160 km/h
99.41939 mph
160 × 0.6213711922 = 99.41939076
About Kilometres per Hour to Miles per Hour
This converter turns kilometres per hour into miles per hour as you type, and works the other way too: type in the miles per hour box to convert back. To convert kilometres per hour to miles per hour, divide by 1.609344 (the same as multiplying by 0.6213711922). For example, 20 km/h is 12.42742 mph, and 90 km/h is 55.92341 mph.
Speed limits in the UK are in miles per hour, most other countries use kilometres per hour, and sailors and pilots use knots, so travellers and drivers convert speeds often. Both units have exact definitions, so the converter gives an exact result, rounded only for display. Use the table below for common values, or set the decimal places to round the answer for a form or a label.
How to use Kilometres per Hour to Miles per Hour
- Type the amount in kilometres per hour in the first box.
- Read the answer in miles per hour in the second box and in the result line below.
- To convert the other way, type in the miles per hour box instead, or use the swap button to open the miles per hour to kilometres per hour page.
- Choose a number of decimal places if you need a rounded figure, then copy the result line.
Common uses
- Reading a wind speed forecast
- Comparing running, cycling or boat speeds
- Physics and engineering homework
- Driving abroad or in a hire car with a different speedometer
Frequently asked questions
How many miles per hour are in one kilometre per hour?
There are 0.6213711922 miles per hour in one kilometre per hour. This figure is exact, because both units have fixed definitions.
How do I convert kilometres per hour to miles per hour?
To convert kilometres per hour to miles per hour, divide by 1.609344 (the same as multiplying by 0.6213711922). For example, 160 km/h is 99.41939 mph.
How do I convert miles per hour to kilometres per hour?
Going the other way, multiply by 1.609344. The miles per hour to kilometres per hour converter does this for you.
What is 120 km/h in miles per hour?
120 km/h is 74.56454 mph.
What is 70 mph in km/h?
70 miles per hour is about 112.7 kilometres per hour, the UK motorway speed limit. 30 mph is about 48.3 km/h.