Input Parameters
Real-time calculation updates dynamically as you adjust inputs. Values remain strictly local on your device.
Estimated 1RMStandard 1RM
116.7kg
~257 lbs
Training Max (90%)
105kg
5-Rep Load (85%)
99.2kg
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: Epley Strength Metric
1RM = Weight × (1 + Reps/30)Standard powerlifting estimation.
Model Assumptions
- Maximal effort set
Variables & Standard Units
| Symbol | Physiological Meaning | Unit |
|---|---|---|
| Reps | Repetitions completed | dimensionless |
Scientific Limitations
- Reps > 10 lose accuracy
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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