Terms of Use

Last updated: November 9, 2026. By using ProjectCalc you agree to these terms.

The service

ProjectCalc provides free, browser-based material estimation calculators and guides. Results are planning estimates based entirely on the values you enter and the assumptions stated next to each calculator.

No professional advice

Nothing on this site is engineering, architectural, or construction advice. Estimates are not construction specifications. Structural, safety-critical, and code-related decisions require qualified professionals and your local building authority.

Acceptable use

• Use the tools for genuine planning purposes.
• Do not attempt to disrupt, overload, or reverse-engineer the service beyond ordinary use.
• Do not misrepresent the calculators' output as professional certification or a quoted price.

No warranty

The site and its calculators are provided "as is" without warranties of any kind, express or implied, including accuracy, fitness for a particular purpose, and availability. You are responsible for verifying quantities, coverage rates, and yields against the actual products you purchase.

Limitation of liability

To the maximum extent permitted by law, ProjectCalc is not liable for material shortfalls, over-purchases, cost overruns, or any damages arising from use of the calculators or reliance on their output.

Intellectual property

The site's text, formulas' presentation, and code are the property of its owner. You may use and share results of calculations freely; wholesale copying of the site content requires permission.

Changes

These terms may be updated as the site evolves; continued use after changes constitutes acceptance.