Affiliate Disclosure

Some pages on Thoughtful Calc may contain affiliate links.

As an Amazon Associate I earn from qualifying purchases.

Each calculator page has a short "What people pick up for this job" box. When its items link to Amazon, we may earn a small commission if you buy through one of those links. It costs you nothing extra, and it helps keep the calculators free. The links open Amazon in a new tab, and whenever the items are links, the box starts with a one-line note about the commission.

We pick the items for the job, not for what pays the most. We don't show prices or star ratings, because those change on Amazon faster than we could keep up.

Calculator results never depend on affiliate links. The numbers come from the sources listed on each page, not from what pays a commission. We may also show ads, described in our privacy policy.

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