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Affiliate disclosure

MaterialCalc is free to use. This page explains how the site may earn money from links, and what that does not affect.

Last updated: 21 October 2026

Current status

As of the date above, MaterialCalc has no active affiliate links. Nothing on this site earns us a commission right now, and there are no ads.

If that changes

If affiliate links are added later, this page will say so before they appear. The links will be marked, and they will not change a calculator's formula or the answer it returns.

Why disclose it

The US Federal Trade Commission requires a clear disclosure when a site earns money from recommending products (16 CFR Part 255). The same rule is the reason this page exists rather than a line buried in the footer.

Editorial independence

Material quantities come from formulas and published product data. We do not raise or lower a number because a product pays a commission. If a link is ever added next to a calculator, the calculator keeps working the same way with or without it.

Questions about this policy: haorufei@126.com.