Terms of use

Using concrete-calculators.com means you accept these terms. They exist mostly to say one thing clearly: the site produces estimates, and decisions built on those estimates are yours. Effective August 31, 2026.

Estimates, not professional advice

Every result on this site is a planning estimate computed from the inputs you enter and the stated assumptions on the page. Nothing here is engineering, architecture, contracting or cost consulting, and no result creates a professional relationship with this site. Concrete quantities, thickness, reinforcement, mix strength and structural decisions must be confirmed with your supplier, your contractor and your local building department before you order or pour. Prices shown are stated national defaults that will differ from your local market.

No warranty

The site is provided as is. We work hard to keep formulas correct and sources current, and the About page explains how, but we do not warrant that any result is accurate, complete or suitable for your project. Published reference figures change, regional practice varies, and your inputs may not describe your site conditions.

Limitation of liability

To the fullest extent permitted by law, the operators of this site are not liable for any loss arising from use of this site, including ordering too much or too little material, project delays, or costs that differ from an estimate. Your sole remedy for dissatisfaction with the site is to stop using it. Where liability cannot be excluded, it is limited to the amount you paid to use the site, which is zero.

Acceptable use

The calculators are free for personal and commercial use, including in your business estimating. You may link to any page. You may not scrape the site into a competing product, republish substantial portions of the guides without permission, or attempt to interfere with the site's operation.

Intellectual property

The site design, copy, guides and code are the property of concrete-calculators.com. The underlying math belongs to everyone; formulas and published industry constants are not ours and never could be.

Advertising

Pages may carry advertising served by Google AdSense once enabled. Advertisers do not influence calculator results or guide content, and the privacy policy explains the cookie choices you have.

Changes and contact

We may update these terms, and the effective date above changes when we do. These terms are governed by the laws of the United States.