Health & Fitness · Free Online Tool
One-Rep Max (1RM) Calculator
Calculate maximal lifting force and percentage intensity training loads using Brzycki, Epley, and Lombardi formulas.
Presets:
Estimated One-Repetition Maximum (1RM)
115.2 kg
Multi-model consensus across Brzycki, Epley, Lombardi, OConner, and Wathan regressions.
Brzycki Formula
112.5 kg
Epley Formula
116.7 kg
Lombardi Power-Law
117.5 kg
Hypertrophy 80% Load
92.2 kg
Metric Distribution Analysis
Brzycki Formula 112.5
Epley Formula 116.7
Lombardi Power-Law 117.5
Hypertrophy 80% Load 92.2
Percentage Training Intensities
100%: 115.2 kg
1 reps • Maximal Strength
95%: 109.4 kg
2 reps • Heavy Neural
90%: 103.7 kg
4 reps • Strength / Power
85%: 97.9 kg
6 reps • Strength-Hypertrophy
80%: 92.2 kg
8 reps • Hypertrophy
75%: 86.4 kg
10 reps • Hypertrophy
70%: 80.6 kg
12 reps • Endurance Base
65%: 74.9 kg
15 reps • Endurance
Frequently Asked Questions
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