Methodology and correction policy

Last updated: September 1, 2026

WorthMath turns common work and money questions into transparent arithmetic. The result should be reproducible: a reader should be able to see what went in, understand the formula, and rebuild the estimate independently. We favor a limited model with disclosed omissions over a complicated result whose assumptions are hidden.

How calculators are prepared

1. Define one practical question the result is intended to answer.
2. Reduce it to inputs a reader can obtain or reasonably estimate.
3. Document the formula and keep units consistent.
4. Test normal, zero, boundary, and invalid input cases.
5. Explain what the result leaves out and when professional advice is appropriate.

Sources and assumptions

Basic arithmetic does not require a citation, but factual guidance and rules should point to primary sources where practical—government agencies, regulators, or original research. A linked source does not endorse every assumption in a calculator. Rates and legal rules can change, so readers should verify current local information before a consequential decision.

Default values are examples, not forecasts or recommendations. Financial models deliberately simplify taxes, fees, changing rates, and individual circumstances. Each calculator page describes the most important limits.

Review and corrections

Calculator logic and the accompanying explanation are reviewed together when a formula changes. New guides include a publication and review date; material revisions update that date. We do not silently change a formula to produce a more appealing result.

If you find a mathematical error, unclear assumption, broken source, or outdated rule, email hello@worthmath.com with the page, input values, observed result, and expected result if known. Corrections are prioritized over new features.

Editorial independence

WorthMath does not accept payment to change a calculator's result or ranking. Advertising, if displayed, is separate from calculator logic and editorial content. A product or service is not recommended merely because an advertisement for it appears on the site.

Scope

WorthMath provides general educational estimates, not personalized financial, investment, tax, legal, employment, or credit advice. Use a calculator to frame questions and compare scenarios; use current account documents and qualified professionals for decisions where an estimate is not enough. You can also read more about the project on the About page.