Terms of use

Last updated: June 10, 2026

1. Estimates, not professional advice

HammerCalc provides planning estimates based on standard construction formulas. Nothing on this site is engineering, architectural, legal, or financial advice, and no professional-client relationship is created by using it. Site conditions and products vary, and despite careful checking our formulas or content may contain errors. Confirm quantities against your own measurements and product packaging, follow local building codes, and consult a licensed professional for structural work.

2. Acceptable use

You may use the site for personal and internal business reference. You may not scrape the site at volume, republish substantial portions of it without permission, misrepresent its outputs as official figures, or interfere with its operation.

3. No warranty

The site is provided "as is" without warranties of any kind, express or implied, including accuracy, fitness for a particular purpose, and availability.

4. Limitation of liability

To the maximum extent permitted by law, HammerCalc and its operators are not liable for any damages arising from your use of, or reliance on, the site or its estimates.

5. Third-party links and ads

Pages link to external sources and may display third-party advertising. We are not responsible for the content or practices of external sites.

6. Changes

We may update these terms at any time; continued use after changes constitutes acceptance.