Mayhew 1RM Calculator
Calculate 1RM using Mayhew et al.'s 1992 exponential bench press model
Input Parameters
Real-time calculation updates dynamically as you adjust inputs. Values remain strictly local on your device.
Mayhew 1RMMayhew 1992
119kg
~262 lbs
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: Mayhew et al. Exponential Formula (1992)
1RM = (100 × Weight) / (52.2 + 41.9 × e^(-0.055 × Reps))Derived from extensive bench press testing across 435 college men and women.
Model Assumptions
- Upper body pressing mechanics
Variables & Standard Units
| Symbol | Physiological Meaning | Unit |
|---|---|---|
| e | Euler's mathematical constant (~2.71828) | dimensionless |
Scientific Limitations
- Calibrated specifically on bench press; can slightly differ on squat or deadlift
Peer-Reviewed Scientific Citations
Muscular endurance repetitions to predict one-rep max in college men and women (1992)
Mayhew JL, Ball TE, Arnold MD, Bowen JC (1992) — Journal of Applied Sport Science Research, 6(4), 200-206
Key Finding: 1RM = (100 * weight) / (52.2 + 41.9 * e^(-0.055 * reps)). Highly evaluated for bench press predictions.
Frequently Asked Questions
Related Calculators & Next Steps
Strength & 1RM
Bench Press Calculator
Calculate bench press 1RM, working percentages, and strength standards
Calculate now
Strength & 1RM
One Rep Max Calculator
Calculate maximum single-repetition lift capacity across Epley, Brzycki, and Lander formulas
Calculate now
Strength & 1RM
1RM Calculator
Fast 1RM calculation for weightlifting and powerlifting programming
Calculate now