The disclosure
Some outbound links on GradeKit are affiliate links. If you follow one and later subscribe to or purchase the product, GradeKit may receive a commission from that company at no additional cost to you. This disclosure is made in accordance with the U.S. Federal Trade Commission’s guidance on endorsements and testimonials.
Where those links appear
Affiliate links appear only in clearly labelled recommendation sections and on the study tools page. They never appear inside a calculator, inside a result, or anywhere they could be mistaken for part of a grade calculation.
What a commission does not affect
It does not affect any number this site produces. The calculators are plain arithmetic, published formula by formula on each page, and there is no commercial arrangement that could change a result. It also does not affect the price you pay — affiliate pricing is the same as going direct.
How recommendations are chosen
A tool is listed because it is genuinely relevant to coursework, not because it pays the most. Where a free or open-source option does the job, that is said openly, including when it means no commission. Tools with no affiliate program are listed on the same footing as tools that have one.
The calculators stay free
Commissions exist so that the calculators can remain free, ad-free, and account-free. If you would rather not use an affiliate link, going directly to the company’s site works exactly the same for you.