About UnitConvertHub

UnitConvertHub is a free online unit converter, built to be fast, accurate, and pleasant to use. We cover the categories people convert between most often: length, weight, temperature, volume, area, and speed — with formulas, conversion tables, and worked examples on every page.

Why we built it

Most converter sites are cluttered, slow, or give answers without explaining where they come from. We wanted something different: a calm, well-typeset page that gives you the right answer instantly and shows you the math, so you can verify it and learn from it.

How accurate are our conversions?

Every conversion uses the exact, internationally accepted SI definitions. For example: 1 inch = 2.54 cm exactly (since 1959), 1 pound = 0.45359237 kg exactly, and 1 mile = 1.609344 km exactly. Internal calculations use full double-precision floating-point arithmetic; only display values are rounded.

How we make money

UnitConvertHub is free for everyone. We support the site through display advertising, clearly labelled and never inserted into the conversion logic itself. We do not collect personal data beyond what is necessary for ad measurement and basic analytics. See our privacy policy for details.

Contact

Questions, corrections, or suggestions? Visit our contact page.