Epley Formula for One Rep Max (1RM)

The Epley Formula is the most common method mentioned to estimate your 1RM based on a weight you can lift for multiple repetitions (submaximal lift):

1RM=Weight×(1+0.0333×Reps)

Where:

• Weight is the amount of weight you lifted.
• Reps is the number of repetitions you successfully performed with that weight.

Example Calculation

The text gives this example:

• Weight Lifted: 200 lbs
• Number of Reps: 5

1RM=200×(1+0.0333×5)1RM=200×(1+0.1665)1RM=200×1.1665

1RM=233 lbs