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Calculate Your One Rep Max

Estimate your 1RM for any lift from the weight and reps you can do. Epley, Brzycki, and Lombardi formulas.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

Como Estimar

Fórmula de Epley: 1RM = Peso × (1 + Reps/30). Se levanta 80 kg por 8 reps: 1RM ≈ 80 × (1 + 8/30) = 101 kg. Mais precisa com 3-10 reps. Acima de 12, resistência muscular distorce a estimativa.

Percentuais de Treino

Força: 85-95% do 1RM, 1-5 reps. Hipertrofia: 65-80%, 6-12 reps. Resistência: 50-65%, 15+ reps. Conhecer seu 1RM permite programar a intensidade com precisão.

⚡ CalcWolf Insight

Strength standards for adult males (approximate 1RM relative to body weight): Bench Press — Beginner 0.5x, Intermediate 1.0x, Advanced 1.5x. Squat — Beginner 0.75x, Intermediate 1.5x, Advanced 2.0x. Deadlift — Beginner 1.0x, Intermediate 2.0x, Advanced 2.5x.

Frequently asked questions
Como calcular?▾
Peso × (1 + reps/30). 60 kg × 10 reps: 60 × 1,33 = 80 kg de 1RM estimado.
Devo testar meu 1RM real?▾
Desnecessário para a maioria. Estimativas com 3-5 reps são suficientemente precisas.
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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