Last updated: 11 November 2026
This page explains how to read the calculators, charts and guides on builderology.com (“Builderology”, “we”) and how the site is funded. It sits alongside our Terms of Use and our Privacy Policy.
Estimates, not professional advice
Our calculators, charts and guides give general planning information. They are not engineering, architectural, legal or other professional advice. Results depend on the numbers you enter and on the assumptions explained on each page, and published reference values (for example wood properties or thread dimensions) are averages or nominal values, not guarantees for a particular board, fastener or product.
Building codes are adopted and amended locally. Before you build anything structural, electrical, plumbing, gas-related or safety-critical, check the requirements with your local building department, follow the manufacturer’s instructions, and get a permit or a qualified professional’s sign-off where one is required.
Where our numbers come from
Each calculator and data page lists its sources and the formula or method it uses. Our methodology and corrections page explains how the tools are checked and how to report a number that looks wrong.
Affiliate links
Some pages contain affiliate links. As an Amazon Associate we earn from qualifying purchases. If you buy through one of these links we may earn a commission at no extra cost to you. Affiliate links do not change the result of any calculator or the values in any chart.
Advertising
This site may show ads served by Google AdSense. Ads are clearly separated from our content, and advertisers do not choose or review what we publish. How ad cookies work, and how to opt out of personalised ads, is explained in our Privacy Policy.
External links
We link to standards bodies, government publications and other sites so you can check our sources. We do not control those sites and are not responsible for their content or availability.
Questions
Email hello@builderology.com, or see our Contact page.