Terms of use
Last updated: September 7, 2026. By using this site you accept these terms.
1. Estimates only
The calculators on this site produce quantity estimates for planning purposes. They are not engineering calculations, construction documents, or a substitute for a licensed professional's takeoff. Always confirm quantities with your supplier and structural requirements with a qualified engineer or your local building department before ordering or building.
2. No warranty
Material densities, coverage rates and bag yields are published industry averages and vary by product, manufacturer, moisture content and installation method. This site is provided "as is," without warranty of accuracy, completeness or fitness for a particular purpose.
3. Limitation of liability
We are not liable for over-ordering, under-ordering, project costs, delays or any other loss arising from use of these calculators. Verify before you buy.
4. Advertising and links
This site may display third-party advertising and link to external sites, including affiliate links where disclosed. We are not responsible for the content or practices of linked sites.
5. Acceptable use
The calculators are free to use for your own projects, commercial ones included. Please do not scrape the site at a rate that degrades it for others, republish its content as your own, or present its output as a certified takeoff or engineering document.
6. Governing law
This site is operated from the Republic of Panama. These terms are governed by the laws of the Republic of Panama, and any dispute arising from them or from use of this site shall be brought before the courts of Panama City, Panama. Nothing in this clause removes any right you hold under the mandatory consumer-protection law of the place where you live.
7. Changes
We may update these terms as the site changes. The date at the top always reflects the current version, and continued use after a change means you accept it.