Affiliate Disclosure

Last updated: 2026

This site participates in the following affiliate programmes:

• Amazon Associates — We participate in the Amazon Associates Programme, earning a small commission (typically 1-4%) when you click an Amazon link and buy something. Amazon links open the correct storefront for your country automatically.
• CJ Affiliate (Commission Junction) — We participate in a small number of affiliate programmes managed through CJ Affiliate (publisher ID 8024985). Commissions vary by merchant.

When you click an affiliate link and make a purchase, we may receive a small commission at no additional cost to you. This helps us maintain and improve the site.

We only link to products we believe are relevant and useful to our visitors. Our editorial content — including all calculator formulas, results, and guide content — is never influenced by affiliate relationships.

Affiliate links are clearly associated with product recommendations and are labelled accordingly, and carry rel="nofollow sponsored noopener" in the HTML for full transparency with search engines and browsers. The calculators themselves contain no affiliate elements and are always free and unbiased.

For questions about our affiliate relationships, use our contact page.