Corrections Policy

Proportion Calculator accepts reports about calculation logic, formulas, sources, explanations, accessibility, and broken links. A useful correction is based on a reproducible case or verifiable source, not simply a preferred answer. Reports can be sent through the address on the Contact page.

What to Include

For a calculator issue, provide the exact page URL, all inputs and selected options, the result shown, the result expected, and the method or source used for comparison. Browser and device details are helpful when the issue concerns layout or interaction.

For a content or source issue, identify the statement, heading, formula, or link and explain why it should change. Link to a primary or authoritative source where possible. Do not send private data from a real person or confidential dataset; a minimal synthetic example is usually enough to reproduce a calculation problem.

Review Process

Reported issues are handled with the following process:

1. Reproduce the behavior from the supplied inputs or page location.
2. Compare the implementation and explanation with the stated methodology and relevant source.
3. Determine whether the problem affects calculation logic, display rounding, interpretation, content, sourcing, accessibility, or only wording.
4. Make the smallest correction that addresses the cause.
5. Run the relevant automated tests, add a regression case when appropriate, and repeat static and browser checks before publishing.

No response time is promised, and not every disagreement leads to a change. Reports without enough information may require further evidence before they can be evaluated.

How Corrections Are Documented

A material correction is one that can change a calculated result, recommended method, stated limitation, or reasonable interpretation. When a material error has appeared on a published page, the affected page should receive a dated, plain-language correction note describing what changed. Minor spelling, formatting, style, and broken-link repairs may be made without a separate notice when they do not alter meaning.

Review dates are changed only when the corresponding content or practice is actually reviewed. Source links are not presented as endorsements, and a source’s later change does not automatically mean the calculator method has been revalidated. Questions about the process can be sent to contact@proportion-calculator.net.