Editorial Policy

Content principles

Calculator pages are written to explain what a calculation does, how its formula works, what the result means, and which limitations users should understand.

We distinguish general educational information from professional financial, medical, legal, tax, or regulatory advice.

Sources

Where a calculator depends on external rules, definitions, health classifications, fees, or government requirements, we prefer primary or authoritative sources such as government agencies, regulators, and recognized public institutions.

Updates

Pages may be reviewed when formulas, regulations, fees, source material, or calculator functionality changes.

A displayed review date indicates when the page's calculator-related content or sources were last checked; it does not guarantee that every external rule or fee remains unchanged afterward.

Corrections

If an error is identified in a formula, explanation, translation, source, or result, we aim to correct it and review affected content.