Terms of Use

Last updated: October 2026.

Estimates, not quotes

All calculators on HomeMathLab produce material estimates based on the measurements you provide and the standard allowances stated on each page. They are not quotes, not structural or engineering advice, and not a substitute for a site measure by your supplier or contractor. Always verify measurements before ordering non-returnable materials.

Acceptable use

You may use the calculators for your own projects and client work. You may not scrape the site at abusive rates, misrepresent our estimates as guaranteed quantities, or resell access to the tools.

Intellectual property

Calculator logic, design and original content are the property of HomeMathLab. Formulas themselves are published openly and may be cited with attribution.

Limitation of liability

The tools are provided "as is". To the maximum extent permitted by law, HomeMathLab is not liable for purchasing or project decisions made using these estimates.