strength
Overhead Press 1RM Calculator
Calculate your strict press max and training percentages without testing a grinder single.
Strict press estimates are most reliable from 2-6 reps.
Estimated 1RM
Epley
262.5 lb
Brzycki
253.2 lb
Lombardi
264.3 lb
O'Conner
253.1 lb
Mayhew
267.8 lb
Wathan
262.3 lb
| Percent | Load | Reps | Purpose |
|---|---|---|---|
| 100% | 262.5 lb | 1 | Max strength |
| 95% | 250 lb | 2 | Max strength |
| 90% | 237.5 lb | 3-4 | Max strength |
| 85% | 222.5 lb | 5-6 | Strength |
| 80% | 210 lb | 7-8 | Strength |
| 75% | 197.5 lb | 9-10 | Hypertrophy |
| 70% | 185 lb | 11-12 | Hypertrophy |
| 65% | 170 lb | 13-15 | Technique or endurance |
| 60% | 157.5 lb | AMRAP | General work |
| 55% | 145 lb | AMRAP | General work |
| 50% | 132.5 lb | AMRAP | General work |
How the 1RM estimate works
The calculator runs Epley, Brzycki, Lombardi, O'Conner, Mayhew, and Wathan formulas. For most barbell lifts, sets of 2-8 reps are more useful than high-rep sets because fatigue and conditioning distort the estimate.
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Questions lifters ask
How should I use the Overhead Press 1RM Calculator? +
Enter a recent hard set with clean reps. The result is best used as a training max input, not as proof that you can hit the number today.
What rep range is best for estimating 1RM? +
Two to eight reps is the useful range for most lifters. Above 10 reps the estimate becomes more sensitive to conditioning, pacing, and technique breakdown.
Should I round the percentage table? +
Yes. Round to plates you can actually load. The calculator uses practical plate increments for pounds and kilograms.