Terms of Use

Effective October 15, 2026.

Planning information

This site provides residential concrete planning tools and editorial guides. Estimates use entered measurements and rates with stated assumptions. A priced subtotal may exclude unknown work. It is not a contractor quote, a purchase order or approval of a slab or drainage design.

Confirm the actual scope and requirements with the relevant supplier, installer and authority before ordering or work. Quantity arithmetic does not choose a suitable thickness or release new concrete for loading. See methods and sources for the current version and limits.

Published sources and external links

Published source dates identify the material used; prices and documents may change afterward. External websites operate independently, and their terms and policies apply when you visit them. A source citation does not imply that its owner endorses this site.

Using site materials

You may link to a page and keep a printed worksheet for your planning. Cite the source when quoting a short passage. Do not republish whole pages or present an illustrative image as proof of a completed job or test. Third-party documents and product names retain their own ownership and scope.

Corrections and changes

Report a source or calculation issue through the editorial contact form. Confirmed corrections can update dependent examples and the method version. The privacy policy explains the form's data handling. The disclosure page states the current commercial status.