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Yes. Every calculation runs in your browser, and what you type stays on your device.

Does it work offline?

Yes. Once this page has loaded, it keeps working without an internet connection.

Convert kilometres to miles, and speeds in km/h to mph.

Valuekm

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1 km is

0.621371mi

Miles

1 km = 0.62137119 mi, so 1 km × 0.62137119 = 0.621371 mi

Good to know: 1 mile is 1.609344 km.
Are my numbers private?: Yes. Every calculation runs in your browser, and what you type stays on your device.
Does it work offline?: Yes. Once this page has loaded, it keeps working without an internet connection.

Ready-made settings for common jobs.

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