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Unit converter

Convert length, mass, temperature, area, volume, speed, time, and storage with clear units and a quick swap.

Conversion preview3.10685596119Miles (mi)

5 Kilometres (km)

1 Kilometres (km) = 0.621371192237 Miles (mi)

Processed on your device

How it works & useful details

How it works & limits

Select a measurement family, enter an amount, and choose units. Swap exchanges the units while keeping the entered amount. Temperature includes offsets and rejects values below absolute zero. These are absolute temperatures, not temperature differences.

US liquid and imperial gallons differ; US cups mean 236.5882365 mL. Storage uses decimal kB/MB/GB and binary KiB/MiB/GiB. Time uses fixed 24-hour days; months and calendar years are omitted. Values are limited to ±1e12 and results use floating-point arithmetic rounded to 12 significant digits.

Your working space

Change the values to explore the preview. Use the action below to create a copyable, downloadable result. All calculations stay on this device; refreshing clears your work.