Legal · Transparency

Affiliate Disclosure

How we earn money, which programs we use, and how it affects our product recommendations

Last updated: May 14, 2025

Short version: Some links on this site are affiliate links. If you click one and buy something, we earn a small commission — at no extra cost to you. This is how we keep our sleep calculators and tools free. We only recommend products we genuinely believe in.

The Full Disclosure

SleepingTimeCalculator.com participates in affiliate marketing programs. This means that when you click certain links on our website and make a qualifying purchase, we may receive a commission from the retailer.

This disclosure is made in accordance with the Federal Trade Commission (FTC) guidelines under 16 CFR Part 255, which requires disclosure of any material connection between a website and product endorsements or recommendations.

Amazon Associates Program

SleepingTimeCalculator.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.

When you see a link to Amazon on our site and click it, a small tracking tag (tag=fitnessfre004-20) in the URL tells Amazon that the visit came from us. If you make a purchase within 24 hours of clicking, we earn a commission — typically 1–10% depending on the product category.

This does not increase the price you pay. Amazon pays us from their own margin.

Other Affiliate Programs

In addition to Amazon, we may participate in affiliate programs with other sleep product companies including mattress brands, sleep accessory retailers, and health product companies. Any such relationships will follow the same principles outlined on this page.

Our Editorial Promise

We want to be completely honest about how commissions affect (and don't affect) our recommendations:

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What we do
Research products thoroughly before recommending them. Include honest pros and cons. Recommend products based on quality and relevance to your needs first.
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What we don't do
Recommend products solely because they pay higher commissions. Write fake positive reviews. Hide negative information about products we link to.
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Our ranking criteria
Products are ranked based on effectiveness for the stated purpose, customer review scores, value for money, and reliability — not commission rate.
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Price transparency
Prices shown are approximate and may change. Always check the current price on Amazon or the retailer's site before purchasing.

How to Identify Affiliate Links

Affiliate links on our site are marked with one or more of the following:

Our free tools — including all sleep calculators — contain no affiliate components and are genuinely free to use without any purchase.

No Additional Cost to You

Clicking an affiliate link and purchasing through it does not cost you anything extra. The commission we earn comes from the retailer's margin, not added to your price. In some cases, our affiliate links may actually unlock special deals or discounts for our readers.

Questions?

If you have any questions about our affiliate relationships or how we select products to recommend, please contact us at hello@sleepingtimecalculator.com. We're happy to be transparent about any specific product or recommendation.