Free Gym AI tool
One-rep max calculator
Estimate your one-rep max with Epley and Brzycki formulas. Free strength tool from Gym AI.
Epley 1RM
116.7 kg
Brzycki 1RM
112.5 kg
Average
114.6 kg
90% working weight ≈ 103.1 kg · 80% ≈ 91.7 kg
Estimates only — not medical advice. Results vary with technique, sleep, and nutrition.