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100 km/h in mph

100 km/h is about 62.1 mph — a common motorway/highway speed.

62.1 mphmiles/hour
100 km/hkm/hour
km/hmph
100 km/h62.1 mph
120 km/h74.6 mph
130 km/h80.8 mph
To convert km/h to mph in your head, multiply by 0.62 (or take 60% plus a bit). Handy when driving abroad and reading a speedometer in the other unit.

Frequently asked questions

What is 100 km/h in mph?

About 62.1 mph.

How do I convert km/h to mph?

Multiply by 0.621 — or roughly, take 60% and add a little.