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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

Formula

1RM = Weight × (1 + Reps/30)। 60 kg × 8 reps: 1RM ≈ 60 × 1.267 = 76 kg। Most accurate with 3-10 reps। Above 12: endurance skews estimate।

Training %

Strength: 85-95% 1RM, 1-5 reps। Hypertrophy: 65-80%, 6-12। Endurance: 50-65%, 15+। Indian gyms: Cult.fit, Gold Gym, local akharas all use these principles।

⚡ 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
How to calculate?▾
Weight × (1 + Reps/30)। 50 kg × 10: 50 × 1.33 = 67 kg 1RM।
Should I test 1RM?▾
Estimate with 3-5 reps is safer and accurate enough for most।
✓ 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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