About UnitCalculators.com
UnitCalculators.com builds calculators that show their work: the answer, the formula, the assumptions, and the sources — so you can trust the number and check it yourself.
We write in plain, expert language and cite authoritative sources — standards bodies, official publications, and peer-reviewed research — for every formula. Estimates are labelled as estimates and never presented as professional advice, and where a calculator touches health, money, or law, we say so plainly.
Every calculator is reviewed before it is published and again on a recurring schedule. Formulas ship with cited sources and test cases drawn from those sources, and any data with a shelf life — tax tables, rates, thresholds — is dated and scheduled for refresh so the numbers stay current.