Send the page URL, the inputs used, the output shown, and the formula or source that supports the correction.
Contact
Send corrections, feedback, and calculator ideas.
For calculator corrections, broken-page reports, or new tool suggestions, email hello@toolkitshelf.com.
Helpful messages include the calculator URL, the inputs used, the result you expected, and any source or formula reference that explains the correction.
Toolkit Shelf does not provide personal finance, medical, tax, legal, employment, engineering, or professional consulting through email. Contact is for site feedback: reporting a bad formula, unclear wording, broken source link, layout issue, missing warning, or practical tool idea that would improve the public directory.
Corrections are easiest to review when the message is specific. Include the page URL, the exact inputs used, the output shown, the output you expected, and whether the issue is arithmetic, wording, source context, units, rounding, or a missing limitation. If a source link moved, include the replacement URL if you have it.
Include the URL, device or browser, what you clicked, and whether the issue affected the calculator, examples, links, or layout.
Flag stale benchmarks, source links, tax/rate assumptions, wording that needs more context, or pages that should show a stronger warning.
Describe the practical question, the inputs people know, the output they need, and any standard method or source that should be visible.
Do not send passwords, full account numbers, private medical details, tax identifiers, or documents that are not needed to reproduce a public calculator issue.
Messages are reviewed as site maintenance requests. A correction may result in a page update, a source replacement, clearer warning text, or no change if the current method is still correct.