How do I calculate my 1RM?
Take a set of 3–8 reps to near failure and run it through a rep-max formula, because accuracy falls off past about 10 reps.
Estimates are most accurate on the bench press and least accurate on the deadlift, where rep endurance varies enormously between lifters.
Run the numbers
Sources
2
- LeSuer, D.A. et al. (1997). The accuracy of prediction equations for estimating 1-RM performance in the bench press, squat, and deadlift. J Strength Cond Res 11(4). Compared the common equations against tested maxes.