SPEED CONVERSION
Mile per hour to Kilometer per hour.
Convert mile per hour (mph) to kilometer per hour (km/h), with the math explained.
1 mph = 1.609344 km/h
THE MATH, MADE SIMPLE
How to convert mile per hour to kilometer per hour
Multiply your mile per hour value by 1.609344 to get the equivalent in kilometer per hour. Both units are normalized through the meter per second.
km/h = mph × 1.60934410 mph = 16.09344 km/h
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
mph to km/h conversion table
| Mile per hour (mph) | Kilometer per hour (km/h) |
|---|---|
| 1 mph | 1.609344 km/h |
| 2 mph | 3.218688 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.9344 km/h |
| 500 mph | 804.672 km/h |
| 1,000 mph | 1,609.344 km/h |
About the mile per hour
The mile per hour (mph) is a unit of speed. One mile per hour equals 0.44704 meter per second (base unit) in this calculator.
All mile per hour conversionsAbout the kilometer per hour
The kilometer per hour (km/h) is a unit of speed. One kilometer per hour equals 0.277777777778 meter per second (base unit) in this calculator.
All kilometer per hour conversionsCommon questions
What is 1 mph in km/h?
One mile per hour equals 1.609344 km/h. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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