Epley Formula 1RM Calculator
Developed by Boyd Epley in 1985, one of the most widely cited 1RM equations in strength research.
w × (1 + r/30) — Developed by Boyd Epley in 1985, one of the most widely cited 1RM equations in strength research.
5 reps
One Rep Max
5 reps @ 225lb
263
lb
Epley formula
Big Four Strength Levels
Strength levels for a 200lb male, age 30 lifting 263lb in each lift type · enter your details.
Rep Max Projections
Epley algorithm
| Reps | Weight (lb) |
|---|---|
| 1RM | 263lb |
| 2RM | 247lb |
| 3RM | 239lb |
| 4RM | 232lb |
| 5RM(current) | 225lb |
| 6RM | 219lb |
| 7RM | 213lb |
| 8RM | 208lb |
| 9RM | 202lb |
| 10RM | 197lb |
| 20RM | 158lb |
Percentage Calculator
Based on 263lb estimated max
| Intensity | Weight (lb) |
|---|---|
| 100% | 263lb |
| 95% | 250lb |
| 90% | 237lb |
| 85% | 224lb |
| 80% | 210lb |
| 75% | 197lb |
| 70% | 184lb |
| 65% | 171lb |
| 60% | 158lb |
| 55% | 145lb |
| 50% | 132lb |
