What the tool does, how to run it, and what to expect from the result.
The Epley formula estimates 1RM as weight x (1 + reps/30), the most widely used estimate for sets of about 10 reps or fewer. The percentage chart applies standard %1RM-to-reps pairings so you can plan bench training weights without maxing out.
A quick way to understand who this helps, what it solves, and where it connects next.
Lifters tracking bench press progress or programming around a percentage of it.
Estimating a bench press one-rep max from a lighter, safer set.
Short answers for the questions people usually have before trying a utility like this.
Yes. It is completely free, with no sign-up and no usage limits.
The formula is the same for any barbell lift; this page is titled for bench press since that is the most common single-lift search, but the math works for squat, deadlift, or overhead press just as well.
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Enter a weight and the reps you got with it to estimate your one-rep max for the bench press, plus a training percentage chart.
215.8 lbEstimated one-rep max (bench press)
100% = 215.8 lb (~1 rep)
95% = 205.0 lb (~2 reps)
90% = 194.3 lb (~4 reps)
85% = 183.5 lb (~6 reps)
80% = 172.7 lb (~8 reps)
75% = 161.9 lb (~10 reps)
70% = 151.1 lb (~12 reps)
65% = 140.3 lb (~15 reps)
60% = 129.5 lb (~20 reps)
Uses the Epley formula, most accurate for sets of 10 reps or fewer. Treat this as a training estimate, not a number to attempt cold in the gym.