Ad & Affiliate Disclosure

Advertising and affiliate links are currently disabled. The publisher covers the site’s operating costs.

Advertising

Advertising is currently disabled. If the site later displays ads from a third-party network such as Google AdSense, showing an ad will not be an endorsement. This disclosure and the Privacy Policy will be updated to match the deployed advertising and consent behavior before ads are enabled.

Affiliate links

Some pages may include affiliate links to tools and materials we believe are genuinely useful for DIY projects. If you click one and buy, we may earn a commission at no extra cost to you. Affiliate links are marked, and you'll always find this notice linked nearby.

Our promise

• Advertising and affiliate relationships never change the answer a calculator gives you. The math is the math — we don't sell materials, so we have no reason to inflate your order.
• We only plan to recommend products we'd consider using on our own projects.
• Recommendations are kept separate and clearly labelled, never disguised as calculator output.

Questions about how we're funded? Ask us anytime.