Terms of use

By using this website, you agree to use its calculators and information lawfully and at your own discretion.

Planning estimates

Results are estimates based on the measurements and assumptions you enter. We do not guarantee exact purchase quantities, cost, coverage, suitability, or code compliance.

Acceptable use

You may use the tools for personal and commercial project planning. You may not disrupt the service, misrepresent our content, or reproduce the website as a competing service without permission.

Dataset use terms

The downloadable CSV datasets and reference tables are provided under the acceptable-use and planning-estimate terms above. Use them for personal or commercial project planning; do not misrepresent their sources or reproduce this website as a competing service without permission. Manufacturer specifications and other third-party source material remain subject to their respective owners’ terms. These terms do not grant rights to third-party material.

Changes

We may correct, improve, add, or remove features and content. Continued use after a change means you accept the updated terms.