Disclosure

Affiliate Disclosure

Last updated: August 7, 2026

Craft Calculators is owned and operated by Sparkbuilt Labs, LLC. Craft Calculators is the public name of this calculator website, not a separate legal entity.

Some recommendations may include links clearly marked as affiliate links. If you click one and make a purchase, Sparkbuilt Labs, LLC may earn a commission at no extra cost to you.

When an affiliate relationship applies, a plain-language disclosure will appear close to the relevant recommendation or links so you can see it before deciding whether to click. A link to this page by itself does not replace that nearby disclosure.

Programs we participate in

Craft Calculators 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.

As an Amazon Associate I earn from qualifying purchases.

Where an Amazon link appears on a calculator page, that same sentence appears alongside it, in the same block as the recommendation. This page records the relationship; it does not stand in for the disclosure next to the link.

How recommendations are chosen

Recommendations must fit the calculator or planning problem where they appear. We do not fill pages with generic product grids. Compensation does not determine calculator formulas, assumptions, safety notes, source selections, or whether a product is mentioned.

We do not present a product mention as personal experience unless that statement is accurate. An affiliate relationship is not a safety guarantee or an endorsement of every use, so you should still check manufacturer instructions, specifications, and safety information before buying or using a product.

How affiliate activity is measured

With analytics consent, we may count an affiliate-link click with the page, recommendation placement, and destination domain. A retailer or affiliate network may separately attribute a later purchase and report a commission. We use those reports to evaluate whether a placement is useful; earnings never change a calculator result.

Current product cards are placeholders unless a retailer link is present and clearly labeled. An ordinary outbound link with no compensation or other material relationship is not an affiliate link.

Questions

For questions about a link or relationship, email hello@craftycalcs.com.