Strength levels for a 200lb male, age 30 lifting 253lb · enter your details.
Brzycki algorithm
| Reps | Weight (lb) |
|---|---|
| 1RM | 253lb |
| 2RM | 246lb |
| 3RM | 239lb |
| 4RM | 232lb |
| 5RM(current) | 225lb |
| 6RM | 218lb |
| 7RM | 211lb |
| 8RM | 204lb |
| 9RM | 197lb |
| 10RM | 190lb |
| 20RM | 119lb |
Based on 253lb estimated max
| Intensity | Weight (lb) |
|---|---|
| 100% | 253lb |
| 95% | 240lb |
| 90% | 228lb |
| 85% | 215lb |
| 80% | 202lb |
| 75% | 190lb |
| 70% | 177lb |
| 65% | 164lb |
| 60% | 152lb |
| 55% | 139lb |
| 50% | 127lb |
Input: Input set: 225 lb x 5 reps
Calculation: Using Brzycki: 225 / (1.0278 - 0.0278 x 5) = 252.8
Result: Estimated squat 1RM: 253 lb
A hard set of 5 is a practical input for most squat estimates because it is heavy enough to be meaningful without the risk of true max testing.
For most lifters, a hard set of 3-8 reps gives the best estimate. A 2006 Journal of Strength and Conditioning Research study found that 5RM data produced the greatest prediction accuracy. Above 10 reps, fatigue and form breakdown introduce more noise into the projection.
Squat 1RM calculators are typically within 5-10% of a true max when the input set is in the 3-8 rep range with good form. Accuracy drops as reps increase, which is why comparing multiple formulas side by side helps you find a realistic range rather than relying on a single number.
Squat strength varies widely by bodyweight, age, sex, and training experience. As a rough guide, an intermediate male lifter might squat around 1.25-1.5x bodyweight. Use our strength level ratings on this page or check the full squat strength standards for a more precise comparison.
