Estimate your one rep max (1RM) from any weight and rep count. Uses Epley, Brzycki, and Lombardi formulas averaged for the best estimate. Includes a complete training load chart.
| % 1RM | kg | lbs | Reps | Training Zone |
|---|
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Your one rep max (1RM) is the maximum weight you can lift for a single repetition with proper form. It is the foundation of percentage-based strength training programs. Knowing your 1RM lets you calculate exact training loads for strength, hypertrophy, and endurance. This guide covers the three main estimation formulas, how to use percentage charts, and training strategies.
| Level | Bench Press | Squat | Deadlift |
|---|---|---|---|
| Beginner | 0.5x BW | 0.75x BW | 1x BW |
| Intermediate | 1x BW | 1.5x BW | 2x BW |
| Advanced | 1.5x BW | 2x BW | 2.5x BW |
| Elite | 2x BW | 2.5x BW | 3x BW |
Scenario 1: Bench Press Programming. James benches 80 kg for 8 reps. Estimated 1RM: 101 kg. His training plan: Strength day: 85 kg x 5 (85%), Hypertrophy day: 70 kg x 10 (70%), Volume day: 60 kg x 15 (60%). He recalculates after each 4-week block. Use our Protein Intake Calculator for recovery nutrition.
Scenario 2: Squat Progression. Maria squats 60 kg for 5 reps. 1RM: 70 kg (1.17x her 60 kg body weight = intermediate level). To progress to advanced (2x BW = 120 kg), she follows a linear progression: add 2.5 kg per week to her working sets. In 12 weeks: 60 + 30 = 90 kg x 5, new 1RM estimate: 105 kg.
Scenario 3: Deadlift Plateau. David deadlifts 180 kg for 3 reps. 1RM: 191 kg. He has been stuck for 8 weeks. Solution: deload to 70% (134 kg) for 2 weeks, then rebuild with a different rep scheme (5x5 at 80% instead of 3x3 at 90%). Deloading resets fatigue and often leads to new PRs. Use our Calories Burned Calculator to ensure adequate fueling.
Scenario 4: Beginner Setting Weights. Priya is new to lifting and does not know what weight to use. She finds she can bench the bar (20 kg) for 15 reps. 1RM: 30 kg. Her training weights: 70% = 21 kg (bar + small plates), 80% = 24 kg. She starts here and adds 1-2.5 kg per week. Use our TDEE Calculator for nutrition to support her new training.
💡 Key insight: You do not need to test your actual 1RM to train effectively. In fact, regularly maxing out increases injury risk and accumulates unnecessary fatigue. Use this calculator with a 3-5 rep set every 4-8 weeks to estimate your 1RM, then train at calculated percentages. This is how competitive powerlifters and strength coaches program training.
| 90-100% | Strength/Power |
| 80-90% | Strength |
| 70-80% | Hypertrophy |
| 60-70% | Endurance |
| 50-60% | Warm-up |