Kilometers to miles converter

what it does

The kilometers-to-miles trick is one number: multiply by 0.621371 and the miles appear. It's the conversion every runner, driver and hiker learns eventually, usually while someone yells a distance at them in the wrong unit.

It shows up wherever kilometers live outside the metric world: a 5K that everyone insists on calling 3.1 miles, a marathon that's 42.2 km of pure stubbornness, a European speed limit saying 100 while the rental car thinks in miles, or a Canadian road trip where every sign speaks a language your odometer doesn't.

The rough version is even simpler: 8 kilometers is about 5 miles, so divide by 8 and multiply by 5 — or just multiply by 0.6 and be close enough for anything that isn't a race. For races, the widget below is exact and never gets out of breath.

Type any kilometer number and the widget answers in miles instantly, with the math written in the hint. Click the result to copy it, and hit the swap button when the argument flips — the miles-to-kilometers version is always one question away.