Contact us

Questions, corrections and ideas for new calculators are all welcome. If a result looks off, tell us which calculator you used and the numbers you entered, and we'll check it.

We read every message and usually reply within two business days.

Partnerships and contributions

If you work in home improvement and would like to contribute a guide or suggest a collaboration, use the same address with "Contribution" in the subject line. We only publish content that's useful to people planning a home project.