Terms of Use

Estimates only

The calculators and articles on this site are for general planning. Results are estimates based on the numbers you enter and on common rules of thumb. They are not a contractor's quote, an engineering design or a guarantee of how much material a job will use.

Check quantities with your supplier, and follow local building codes and permit requirements. Get professional advice for structural work such as decks, roofs and retaining walls.

No warranty

We work to keep the formulas and content accurate, but the site is provided as is, without warranties of any kind. We are not liable for any loss or damage arising from your use of the site or reliance on its results.

Use of the site

You may use the calculators for personal and business purposes. Do not copy the site's content in bulk, interfere with its operation, or use it for anything unlawful.

Links to other websites are provided for convenience. We are not responsible for their content.

Changes

We may update these terms and the site at any time. The date at the top shows the latest version.