This Calculator Accuracy Policy explains how Ready to Calculate handles formulas, source notes, updates, and the limits of online estimates.
Calculators are estimates
Our calculators are built to provide useful estimates, not final professional advice. Tax, financial, legal, engineering, health, and education outcomes can depend on details that no short web form can fully capture.
Sources and update notes
Where a calculator depends on public rates or official rules, we include a source note near the tool. UK tax tools, for example, identify the tax year used. AI pricing tools identify when pricing was last reviewed because provider plans can change quickly.
Testing approach
Before publishing, calculators are tested with normal inputs, edge cases, and simple manual checks where possible. We also review layout on mobile because many users run calculators on phones.
Known limits
Some calculators simplify real-world rules to keep the tool usable. When assumptions matter, the page should state them near the result or in the FAQ. Users should verify high-stakes decisions with official sources or a qualified professional.
Report an issue
If you find a calculator that appears wrong, please use the Contact page and include the URL, your inputs, the result, and any official source you are comparing against.