Mile per hour to Kilometer per hour Converter
Convert miles per hour to kilometers per hour with this free speed converter. The exact relationship used on this page is 1 mile per hour = 1.609344 kilometers per hour. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: Kilometer per hour = Mile per hour × 1.609344
How to convert miles per hour to kilometers per hour
- Enter the value in miles per hour in the converter.
- Read the equivalent amount in kilometers per hour.
- Use the swap link if you need kilometer per hour to mile per hour instead.
- Check the table for common values without typing.
Worked examples
- 1 mph = 1.609344 km/h
- 5 mph = 8.04672 km/h
- 10 mph = 16.09344 km/h
- 25 mph = 40.2336 km/h
Conversion table
Common miles per hour values converted to kilometers per hour.
| mph | km/h |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 4 | 6.437376 |
| 5 | 8.04672 |
| 6 | 9.656064 |
| 7 | 11.265408 |
| 8 | 12.874752 |
| 9 | 14.484096 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 250 | 402.336 |
| 500 | 804.672 |
| 1,000 | 1,609.344 |
About this conversion
Mile per hour (mph) and Kilometer per hour (km/h) are both speed units. Speed conversion is essential for travel, athletics, aviation, and physics homework. Bookmark this URL when you convert miles per hour to kilometers per hour often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the kilometer per hour to mile per hour converter.
FAQ
How many kilometers per hour are in 1 mile per hour?+
1 mile per hour equals 1.609344 kilometers per hour.
What is the formula to convert miles per hour to kilometers per hour?+
Kilometer per hour = Mile per hour × 1.609344
How do I convert miles per hour to kilometers per hour by hand?+
Multiply the mile per hour value by 1.609344. Example: 10 miles per hour × 1.609344 = 16.09344 kilometers per hour.
Is this mph to km/h converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.