One Rep Max Calculator (1RM - 7 Sports Formulas)
Maximum strength and workout periodization audit. Estimate 1-Repetition Maximum (1RM) from submaximal lifts (1-10 reps) comparing Epley, Brzycki, Lander, Lombardi, Mayhew, O'Conner, and Wathan equations.
Input Parameters
Instant Calculation Result
Adjust values on the left to calculate live results.
In-Depth Guide & Mathematical Methodology
🏋️ Training Zones Based on % 1RM
Maximal Strength (90-100% 1RM): 1-3 Reps. Neural adaptation and maximal strength capacity.
Hypertrophy Zone (75-85% 1RM): 6-12 Reps. Optimal mechanical tension and metabolic stress for muscle growth.
Muscular Endurance (60-70% 1RM): 15-20 Reps. Capillary density and metabolic fatigue resistance.
Frequently Asked Questions (FAQ)
What is the One Rep Max Calculator (1RM - 7 Sports Formulas) and how does it work?
Maximum strength and workout periodization audit. Estimate 1-Repetition Maximum (1RM) from submaximal lifts (1-10 reps) comparing Epley, Brzycki, Lander, Lombardi, Mayhew, O'Conner, and Wathan equations.
How do I use this One Rep Max Calculator (1RM - 7 Sports Formulas)?
Enter weight lifted during exercise (bench press, squat, deadlift, overhead press). Enter number of completed repetitions with proper form (between 1 and 10 reps). Select your preferred sports science formula (Epley or Brzycki). View estimated 1RM and percentage load training chart (95%, 85%, 75%, 70%).
What mathematical formula is used in this calculation?
Sports Science Formulas: 1. Epley: 1RM = Weight × (1 + Reps/30). 2. Brzycki: 1RM = Weight × (36 / (37 - Reps)). 3. Lander: 1RM = (100×Weight) / (101.3 - 2.67×Reps).
Is the One Rep Max Calculator (1RM - 7 Sports Formulas) on FindCalculator free to use?
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