1RM / Privacy
Privacy
The calculators run in your browser. The weight, reps, and body weight you type stay on that page. They are not saved to an account, because there is no account.
A normal web host may keep a technical log of the request, such as the time, the page, and an IP address. Google Analytics and Microsoft Clarity also count visits. This site does not set advertising cookies. If that changes, this page will say so. Cookie details are on the cookies page.
These numbers are a planning estimate. They are not medical advice and they are not a reason to attempt a max without a spotter and a rack.