Who reviews this content
SpecWhale is built and maintained by Redwan, an independent developer -- see the About page. There is no editorial staff beyond that; the process below is how a solo-maintained site keeps hundreds of formula-driven pages consistent and correct without a large team.
Where the numbers come from
Unit converters use fixed, published conversion factors from a single data file shared by every converter on the site, so the same ratio is never defined twice and cannot drift between pages. The full factor tables are public at /reference/.
Finance and health calculators
Finance and health tools use standard, named formulas (loan amortization, BMI, MET-based calorie estimates, and similar well-established methods) rather than proprietary models. Each tool's page states its formula directly above the calculator.
Build-time checks
Every formula-driven tool is executed against multiple sample inputs automatically before each deploy; a tool that throws an error on every sample input fails the build instead of shipping broken. This is a mechanical check, not a guarantee of real-world accuracy -- it catches typos and broken expressions, not domain judgment.
Corrections
If you spot a wrong formula, an outdated conversion factor, or a broken calculator, it gets fixed directly in the shared data file behind the affected page (and every sibling page using the same factor) rather than patched on one page at a time. Changes of any real substance are logged on the changelog.
Limitations
SpecWhale is a free utility reference, not professional advice. Finance, health, and legal-adjacent results are estimates built on stated assumptions. Confirm anything high-stakes with a qualified professional or an authoritative primary source before acting on it.