Input Parameters
Real-time calculation updates dynamically as you adjust inputs. Values remain strictly local on your device.
Deadlift 1RMProficient (2.0x BW)
186.7kg
2.33× bodyweight (~412 lbs)
Bodyweight Ratio
2.33x
Training Max (90%)
168kg
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 Deadlift 1RM Equation
Deadlift 1RM = Weight × (1 + Reps/30)Applies posterior chain pulling mechanics from a dead stop on the floor.
Model Assumptions
- Repetitions pulled from dead stop without bouncing
Variables & Standard Units
| Symbol | Physiological Meaning | Unit |
|---|---|---|
| Ratio | Deadlift 1RM / Body Weight | dimensionless |
Scientific Limitations
- Touch-and-go bouncing on high reps distorts estimated 1RM
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.
Frequently Asked Questions
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