How do I convert mph to km/h?

Multiply mph by 1.609344 to get km/h.

Does this tool store my data?

No. It runs locally in your browser.

Convert miles per hour (mph) to kilometers per hour (km/h) instantly. Fast, mobile-friendly, privacy-first — runs locally in your browser.

Miles per hour

mph

Kilometers per hour

km/h

Decimals

Enter a value to convert.

Formula: km/h = mph × 1.609344.

Type in either field to convert instantly. This tool runs locally in your browser.