1RM Submaximal & Consensus Calculator
Calculate your estimated one-repetition maximum across multi-formula peer-reviewed consensus.
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About This Calculation
What is Submaximal 1RM Testing?
One-repetition maximum (1RM) represents the peak gravitational load an athlete can move through a full range of motion with standard biomechanical technique. Direct 1RM testing presents injury risk and substantial neuromuscular fatigue. Submaximal estimations extrapolate true maximal capacity from repetitions performed to near-volitional failure (RPE 9–10) within the optimal 2–10 repetition window.
Why Consensus Range Matters
No single mathematical formula accurately predicts capacity across all individuals. The Epley formula is often well-calibrated for high-repetition efforts, while Brzycki excels in the 3–6 repetition band. ProSCA displays both individual mathematical outputs and the unified consensus range to avoid false precision.
1. Epley, B. (1985). Poundage chart. Boyd Epley Workout. 2. Brzycki, M. (1993). Strength testing—Predicting a one-rep max from reps-to-fatigue. JOPERD, 64(1), 88-90. 3. Lander, J. (1985). Maximum based on reps. NSCA Journal, 6(6), 60-61.
Computed Performance Result
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| Lifted Weight | 100 kg_or_lb |
| Repetitions Completed | 5 reps |
| Exercise Type | back_squat |
| Athlete Bodyweight (Optional for Relative Ratio) | 80 kg_or_lb |
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