Terms of use

By using Project Cost Math you agree to these terms.

Estimates only

All results are rough estimates, not 100% accurate, not a guarantee and not financial advice. Prices are assumptions or state-level adjustments, not quotes from any store. You are responsible for measuring, checking product instructions and local codes, and deciding what to buy. For structural, electrical or permitted work, consult a qualified professional.

No warranty and limitation of liability

The site and every result are provided "as is" and "as available", without warranties of any kind, express or implied, including accuracy, completeness or fitness for a particular purpose. To the fullest extent the law allows, we are not liable for any direct, indirect, incidental or consequential losses arising from your use of the site or reliance on its results. This includes decisions about what to buy, how much to order or whether to hire a professional. Always verify numbers yourself before you act on them.

Embedding

You may embed our calculators using the provided code, keeping the link back to the original page.

Third-party data

Regional price data comes from the U.S. Bureau of Economic Analysis and ZIP matching from the U.S. Census Bureau; neither endorses this site.

Changes

We may update these terms; the date below shows the latest version.

Last updated October 22, 2026.