About NexUnit

NexUnit is a free collection of 354 unit converters and calculators — from everyday lengths and recipes to mortgages, time zones and electrical units. It is made by GP Creative Studios, which also makes the NexUnit app for iPhone.

Exact, sourced numbers

Conversion factors come from exact definitions wherever one exists (an inch is exactly 0.0254 m, a pound exactly 0.45359237 kg, a US gallon exactly 231 cubic inches) and otherwise from NIST Special Publication 811, NIST Handbook 44, the SI Brochure and IEC 80000-13. Every converter is covered by automated tests that check reference values in both directions.

Private by design

The tools run in your browser. What you type isn't uploaded — see the privacy policy for the few exceptions.

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