Mph ↔ kph
CopiedAbout this mph ↔ km/h converter
Speed both ways for travel, treadmill, or posted-limit comparisons.
1 mile = 1.609344 km, so km/h = mph × 1.609344 and mph = km/h ÷ 1.609344.
Not a pace (min/km) tool and not wind-adjusted airspeed.
How do you convert mph to km/h?
Multiply by 1.609344. That is the international mile in kilometers, exact.
Is a US survey mile different?
Slightly, in old survey work. This page uses the international mile.
Is anything stored?
No. The math stays in your browser.
Nothing is stored. Runs in your browser.