Miles per Hour to Kilometers per Hour (mph to km/h)
Convert mph to km/h in one step, learn the formula, and use the quick reference table for common speeds.
Quick answer: To convert miles per hour to kilometers per hour, multiply the mph value by 1.60934. For example, 60 mph × 1.60934 = 96.56 km/h. The km/h figure is always larger because a mile is longer than a kilometer.
mph to km/h formula
The conversion uses the same factor as miles to kilometers:
km/h = mph × 1.609344
Because one mile is exactly 1.609344 kilometers, this factor gives an exact result. For everyday use you can round it to 1.60934 with no meaningful loss of accuracy.
How to convert mph to km/h in 3 steps
- Take the speed in mph (for example, 70 mph).
- Multiply by 1.609344 → 70 × 1.609344 = 112.6541.
- Round as needed → 70 mph ≈ 112.65 km/h.
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| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 mph | 1.6093 km/h |
| 20 mph | 32.1869 km/h |
| 30 mph | 48.2803 km/h |
| 50 mph | 80.4672 km/h |
| 60 mph | 96.5606 km/h |
| 70 mph | 112.6541 km/h |
| 80 mph | 128.7475 km/h |
| 100 mph | 160.9344 km/h |
mph vs km/h
mph (miles per hour) is used on US and UK roads, while km/h (kilometers per hour) is the metric speed unit used in most countries. Speed limits and speedometers differ by region, so this conversion is handy for driving abroad.
Frequently asked questions
How do you convert mph to km/h?
Multiply the mph value by 1.60934. For example, 60 mph × 1.60934 = 96.56 km/h.
What is 1 mph in km/h?
One mile per hour equals about 1.609 km/h.
What is 70 mph in km/h?
70 mph equals about 112.65 km/h (70 × 1.609344 = 112.6541).