Direct conversion
Convert mile per hour [mph] to kilometer per hour [km/h] instantly with formula, examples, chart, and FAQs.
Quick answer
Use the calculator below for any custom value, then check the formula, examples, chart, and reverse conversion links.
1 mile per hour [mph] = 1.609344 kilometer per hour [km/h]
1 mile per hour [mph] = 1.609344 kilometer per hour [km/h]
Example: 1 mile per hour [mph] equals 1.609344 kilometer per hour [km/h].
Speed conversions use meter per second as the reference unit. Road, aviation, nautical, and physics units are converted through stored factors.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
Miles per hour measures how many miles are traveled in one hour.
HistoryThe unit combines the customary mile with the hour and became common with road, rail, and vehicle speed measurement.
Current useMiles per hour is used for road speeds, vehicle dashboards, wind speeds, sports, and travel planning in the United States and UK.
Kilometers per hour measures how many kilometers are traveled in one hour.
HistoryThe unit follows the metric system and became the common road-speed unit in many countries.
Current useKilometers per hour is used for speed limits, vehicles, cycling, running, weather reports, and transportation planning.
| mile per hour [mph] | kilometer per hour [km/h] |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 1000 | 1609.344 |
Use this formula: 1 mile per hour [mph] = 1.609344 kilometer per hour [km/h] Enter your value in the calculator and the result updates instantly.
1 mile per hour [mph] equals 1.609344 kilometer per hour [km/h].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.