Editorial policy

Sourcing

We cite primary authorities: national standards bodies, official government publications, and peer-reviewed references. For unit definitions that means the BIPM SI Brochure, NIST Special Publication 811, NIST Special Publication 330, and NIST Handbook 44, as they apply. We do not treat unofficial blogs, or unsourced secondary write-ups, as the definition of a unit or a formula.

Every conversion page and calculator has a Sources block that names the defining standard or the publication behind the math, with a link and a review date.

Corrections

If you find an error, use the contact page and include the URL, the number you think is wrong, and the source you checked. We will investigate against the cited standard or official publication. When we correct a published error, we update the page and its review date. We do not quietly rewrite history to hide a mistake.

Updates

Each calculator carries a last-reviewed date, which also feeds the sitemap. Conversion datasets carry an updated date used the same way. Time-sensitive figures are refreshed on the schedule described in the methodology. A page that has not changed still shows the date it was last checked.

Use of AI

We use AI tools to help draft and check pages. A person reviews every page before it is published. Every conversion factor, formula, and factual claim is checked against the cited standard or primary source. AI output is never a source. If a fact cannot be sourced, it does not appear.

No invented claims

We do not invent statistics, user counts, rankings, biographies, credentials, or sources. Estimates are labeled as estimates. A conventional choice — for example, using a 365.25-day Julian year for month and year conversions — is described as a convention, not as a measurement of a particular year.

Editor