Formula review
Defined conversions are checked against recognized measurement standards. Tests cover formula direction, inverse relationships, representative values, and display rounding.
Trust and review
Editorial and formula review policy
This policy explains how calculator content is created, tested, labeled, corrected, and kept independent.
Reviewed: July 27, 2026
Sources and assumptions
Exact SI relationships are distinguished from material-density estimates, regional land conventions, and live-market values. Assumptions that can change the answer are stated near the tool.
AI-assisted content
AI can normalize natural-language requests and explain supported calculations. It does not replace the local formula registry, and unclear requests should return a clarification or limitation instead of an invented factor.
Corrections
Formula and labeling reports receive priority review. A correction should include the page URL, entered value, observed result, expected result, and the reference being compared.
Finance and health
Finance and health tools are educational estimates, not professional advice. Users should verify consequential decisions with official statements and qualified professionals.
Advertising independence
Advertising supports the website but does not determine formulas, rankings, recommendations, or editorial conclusions. Sponsored editorial content is not currently published.