Affiliate Disclosure

Last updated: May 2026

Amazon Associates

ZZZCalc is a participant in the Amazon Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.co.uk.

This means that when you click on certain product links on ZZZCalc and make a purchase on Amazon, we may earn a small commission — at no additional cost to you. The price you pay is exactly the same whether you use our link or go to Amazon directly.

Which Links Are Affiliate Links?

Affiliate links on ZZZCalc are product links that include our affiliate tag (tag=quiktools-21). These appear in product recommendation sections on our pages. We label these sections clearly with disclosures such as "Some links above are affiliate links."

How We Choose Products to Recommend

We only recommend products that are genuinely relevant to improving sleep quality — such as sleep masks, white noise machines, earplugs, and blackout curtains. Our product recommendations are based on relevance to sleep improvement, not on commission rates. We aim to recommend products that provide real value to our users.

No Extra Cost to You

Using our affiliate links never increases the price you pay. Amazon's pricing is identical whether you arrive via an affiliate link or directly. The commission comes from Amazon's side, not from you.

Editorial Independence

The sleep calculator tool, sleep guides, and editorial content on ZZZCalc are completely independent of our affiliate relationships. We do not allow affiliate arrangements to influence the accuracy or integrity of our sleep science content.

Questions?

If you have any questions about our affiliate relationships, please contact us.