Using the tools
You may use the calculators and explanations for your own planning and measurement work. The site does not require an account, sell materials or process payments. Prices, coverage rates, allowances and other project-specific values are supplied by you.
Check inputs and estimates before acting
Results depend on the values, units, measurement basis and assumptions you select. Rounded results and simplified models may differ from supplier tallies, physical measurements or the behavior of a specific product.
Verify important results independently before purchasing, cutting or operating equipment. Follow current product and equipment instructions. If you find a problem, report the page, inputs and expected result so it can be reviewed.
Professional and safety limits
The site does not provide structural engineering, building-code approval, professional design or machine-safety certification. Material-quantity estimates do not establish load capacity or safe installation. Obtain qualified advice where your project requires it.
Accuracy, availability and changes
The tools and explanations are provided as available, without a guarantee that every result is accurate or that the site will always be available. I may correct, update or remove a tool when needed. To the extent permitted by applicable law, use of the site is at your own risk.
Nothing in these terms excludes rights, duties or liabilities that cannot be excluded under applicable law.
Responsible use
Do not interfere with the site’s operation, try to gain unauthorized access to its services or present its estimates as certified professional advice. Using a calculator does not give you ownership of the site’s branding or other materials.
Privacy and contact
Calculator data is processed in your browser. The privacy policy explains website delivery, security features and correspondence.