How heavy
can you go?
Enter a weight and the reps you completed. Get an Epley estimate, a Brzycki estimate and a percentage table for the working sets that follow.
The calculator
Read the
number.
One weight, one rep count. The result updates as you type. The table is built from the Epley estimate.
Estimates only — ask a coach before maxing out.
Estimated one-rep max
Epley
262.5 lb
Brzycki
253.1 lb
Working sets
Based on Epley, rounded to 5 lb
| Percent | Load |
|---|---|
| 95% | 250 lb |
| 90% | 235 lb |
| 85% | 225 lb |
| 80% | 210 lb |
| 75% | 195 lb |
| 70% | 185 lb |
| 65% | 170 lb |
| 60% | 160 lb |
How it works
Simple math.
Honest limits.
Two formulas
Epley: weight × (1 + reps / 30). Brzycki: weight × 36 / (37 − reps). Both are estimates. They get less reliable as the rep count climbs.
Working sets
The table starts at 95% and steps down to 60% in five-point increments. Loads are rounded to 5 lb or 2.5 kg so they match the plates on the floor.
Use the number
Pick a percentage for the day, not a personal record. If the bar slows down or your form changes, the estimate was optimistic. Drop the load and finish the set.
Join War House
GET ON THE FLOOR.
Take the number to the floor, not to your ego. Warm up, load the bar and leave a rep in reserve.