Terms of Service
Last updated: 2026
The calculators provide estimates to help you plan and shop. They are not professional, structural, or engineering advice.
Estimates only
The calculators produce approximate material quantities based on the values you enter and standard formulas and constants. Real-world results vary with product, site conditions, waste, and measurement accuracy. Always confirm quantities against your own measurements and product packaging before buying, and follow all applicable building codes.
No warranty
The site and its tools are provided “as is” without warranties of any kind. We strive for accuracy and verify our formulas against authoritative sources, but we do not guarantee that every result fits your specific project.
Limitation of liability
We are not liable for any loss or damage arising from use of the calculators, including over- or under-ordering of materials. You are responsible for verifying quantities before purchase or construction.
Acceptable use
You may use the calculators for personal and commercial project planning. Please don’t attempt to disrupt the site or misrepresent it as your own.
Changes
We may update these terms and the calculators over time. Continued use of the site means you accept the current terms.