ToolNestMiles per Hour to Kilometers per Hour Converter
Convert miles per hour to kilometers per hour instantly with our free speed converter. 1 mile per hour = 1.609344 km/h — type any value below and the result updates live.
Miles per Hour → Kilometers per Hour⇄ Swap: Kilometers per Hour → Miles per Hour
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Miles per Hour to Kilometers per Hour Formula
Kilometers per Hour = Miles per Hour × 1.609344 (Miles per Hour = Kilometers per Hour × 0.621371)
Speed conversion for driving, aviation, and sports — miles per hour (US roads), kilometers per hour (metric roads), meters per second (science), knots (aviation and marine), and feet per second.
Miles per Hour to Kilometers per Hour Conversion Table
| Miles per Hour | Kilometers per Hour | |
|---|---|---|
| 1 mph | = | 1.609344 km/h |
| 2 mph | = | 3.218688 km/h |
| 5 mph | = | 8.04672 km/h |
| 10 mph | = | 16.09344 km/h |
| 25 mph | = | 40.2336 km/h |
| 50 mph | = | 80.4672 km/h |
| 100 mph | = | 160.9344 km/h |
About Miles per Hour and Kilometers per Hour
Miles per hour is the US standard for road speed limits and vehicle speeds — 60 mph is about 97 km/h.
Kilometers per hour is the metric standard for road speeds worldwide — 100 km/h is about 62 mph.
Frequently Asked Questions
How many kilometers per hour are in one mile per hour?
One mile per hour equals 1.609344 kilometers per hour. Multiply any miles per hour value by 1.609344 to convert it.
What is the formula for converting miles per hour to kilometers per hour?
Kilometers per Hour = Miles per Hour × 1.609344. To reverse it: miles per hour = kilometers per hour × 0.621371.
How do I convert kilometers per hour back to miles per hour?
Divide the kilometers per hour value by 1.609344 (equivalently, multiply by 0.621371). Or use our kilometers per hour-to-miles per hour converter going the other way.
Which is bigger, a mile per hour or a kilometer per hour?
A mile per hour is bigger — one mile per hour equals 1.609344 kilometers per hour.