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Fitness
1RM
One-rep max (Epley formula)
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Parameters
Results
- 1RM (Epley)
- 262.5 lb
How it works
Estimate your one-repetition maximum (1RM) from a submaximal set using the Epley formula.
Who it's for: Weightlifters and coaches planning training loads without testing a true max.
Formula: 1RM = weight × (1 + reps ÷ 30).
Useful for setting working weights — e.g., 70% of 1RM for hypertrophy, 85–90% for strength work.
Accepts weight in pounds as shown in the calculator.
How to use
- Enter the Weight you lifted in lb.
- Enter Reps completed at or near failure with that weight.
- Read 1RM (Epley) as your estimated single-rep maximum.
Good to know
- This is a statistical estimate — do not attempt the calculated max without proper warm-up and a spotter.