By using this site, you agree to use its calculators and content as planning information and to verify decisions that affect purchases, safety, property, or construction.
Permitted use
You may use the public calculators and guides for personal or business planning. Do not misuse the site, interfere with its operation, probe it for abuse, copy substantial original content for republication, or represent its estimates as professional certification.
Estimates and your responsibility
Results depend on the values and assumptions entered. You are responsible for checking measurements, product labels, prices, site conditions, manufacturer instructions, local requirements, and professional needs before buying or building.
Third-party links and services
Sources and external services are provided for context. We do not control their content, availability, prices, privacy practices, or current instructions. A link does not imply endorsement in either direction.
Availability and changes
The site may change, pause, correct, or remove features and content. We do not promise uninterrupted availability or permanent storage of browser data. Save or print information needed for a project.
No invented legal review claim
These terms are written in plain language for the launch site. They are not described as attorney-reviewed. Applicable mandatory rights and laws still apply.
Last updated: August 12, 2026.