Affiliate disclosure
This site doesn't contain any affiliate links, and we don't earn a commission from any link on it.
Some calculator pages link to spreadsheet templates that we make and sell ourselves in our shop. Those are our own products. If you buy one, we earn money from the sale, the same as any shop selling its own goods.
If we ever add an affiliate link, this page will be updated first, and the link will carry a clear disclosure right next to it.