Input Parameters
Real-time calculation updates dynamically as you adjust inputs. Values remain strictly local on your device.
Squat 1RMIntermediate (1.5x BW)
151.7kg
1.9× bodyweight (~334 lbs)
Bodyweight Ratio
1.9x
Training Max (90%)
136.5kg
Clinical Responsibility Note: This calculation provides statistical estimations for informational and educational purposes only. It is not an individualized medical diagnosis or clinical prescription.
Mathematical Formula & Scientific Methodology
Formula: Barbell Back Squat 1RM Equation
Squat 1RM = Weight × (1 + Reps/30)Applies standard strength mechanics to deep parallel squats.
Model Assumptions
- Squats performed to parallel depth (hip crease below top of knee)
Variables & Standard Units
| Symbol | Physiological Meaning | Unit |
|---|---|---|
| Ratio | Squat 1RM / Body Weight | dimensionless |
Scientific Limitations
- Half squats inflate repetition numbers and distort 1RM projections
Peer-Reviewed Scientific Citations
Poundage chart. Boyd Epley Workout (1985)
Epley B (1985) — University of Nebraska-Lincoln Strength Training Manual
Key Finding: 1RM = weight * (1 + reps / 30). Highly accurate for resistance exercises within 1 to 10 repetitions.
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