Contact and Corrections

Use this form for a source correction, calculation issue or question about a page. Include the page URL and enough detail to identify the issue. For a calculation, state the units and relevant inputs without personal property details.

This is an editorial contact form. It does not request a contractor quote, collect a phone number or enroll you in marketing emails. The name and reply address help us handle your message.

Useful correction details

• The page URL and the statement or output that needs review.
• The original source URL and its publication date, if available.
• The relevant units and calculation inputs, if the issue concerns arithmetic.

We check corrections against the relevant source and method. A confirmed change may update more than one dependent example. See methods and sources for the current calculation scope.

The form reports whether a submission was accepted or unavailable. Read privacy for how correction messages are handled and disclosure for the site's commercial status.