Terms of Use

Last updated: 7 September 2026

These are estimates

The calculators on this site produce estimates for planning and purchasing. They are not engineering calculations, structural advice, or a substitute for a professional who has seen your site.

Material quantities depend on things a web page cannot know: how flat your subgrade is, how porous your walls are, how your forms behave under load, what your local building code requires, and what the specific product you bought actually yields. Always check the figures against the product label and, for structural work, against a qualified professional and your local building authority.

No warranty

This site and its calculators are provided "as is", without warranty of any kind, express or implied. While the formulas and reference figures are checked and the underlying conversion code is covered by automated tests, no guarantee is made that a result is correct or fit for your particular project.

Limitation of liability

To the fullest extent permitted by law, the operator of this site is not liable for any loss or damage — including wasted material, project delays, cost overruns or structural failure — arising from the use of, or reliance on, anything on this site. You are responsible for verifying quantities before you buy and before you build.

Acceptable use

You may use these calculators freely for personal and commercial projects, including quoting work for clients. You may not scrape the site at a rate that degrades it for others, republish its content as your own, or present its results as professional certification.

External links and advertising

Pages may link to manufacturers, suppliers and reference material, and may display advertising. Linked and advertised parties are independent; their content, products and privacy practices are their own responsibility, not this site's. See the privacy policy for how advertising cookies are handled.

Changes

These terms may be updated; the date at the top of the page reflects the current version. Continuing to use the site after a change means accepting the revised terms.

Contact

Questions about these terms: hello@squarefootcalcs.com.