Free strength calculator
Estimate your one rep max from a recent set, then use RackMath to track PRs and future training loads.
RackMath angle
A one rep max estimate is useful for programming, progress checks, and attempt planning. It is still an estimate, so RackMath treats it as training context rather than a promise.
Track this PRFree value
This tool gives you the quick answer without requiring an account. It is designed for the search moment, when you need a number or a plan before the next set.
App handoff
Open RackMath when you want the result connected to your workout, plate setup, history, PRs, warmups, or program progression.
Want this in your training flow?
