How to Estimate Your Bench Press 1RM
The bench press is one of the three powerlifting movements and the most common upper body strength test. Your bench 1RM helps you program your training and track your progress.
Rather than risking injury with a true max test, use estimation formulas from a submaximal set. For example, if you lift 80 kg for 8 reps, you can accurately estimate your 1RM.
Calculation Formulas
Two well-established formulas for estimating your bench press 1RM:
Epley Formula
1RM = Charge × (1 + Répétitions / 30)Particularly accurate for sets of 8-10 reps. Widely used by strength coaches for bench press programming.
Brzycki Formula
1RM = Charge × 36 / (37 - Répétitions)More conservative, ideal for short sets (3-6 reps). Often preferred for heavy bench press work.
What's a Good Bench Press 1RM Based on Body Weight?
Here are conservative benchmarks for bench press 1RM relative to body weight:
Mistakes That Skew Your Bench Press Estimation
Avoid these common errors when estimating your bench press 1RM:
- Incomplete range of motion: The bar must touch your chest and lock out at the top. Partial reps inflate your estimated 1RM.
- Bouncing off the chest: Using momentum from bouncing the bar off your chest overestimates your true strength.
- Lifting your butt: Glutes must stay on the bench throughout the lift. Lifting reduces range of motion and skews results.
- Inconsistent grip width: Use the same grip width for testing and training. Grip width significantly affects performance.
- Testing when fatigued: Test your bench press 1RM at the start of your session, after proper warm-up but before fatigue sets in.
Programming Percentages: Strength vs Hypertrophy
Once you know your bench press 1RM, program your training based on your goals:
Bench Press Specific Recommendations
Proper Warm-up Protocol
A structured warm-up is crucial for bench press safety and performance:
- Empty bar: 2 sets of 10 reps (focus on technique)
- 50% of working weight: 8 reps
- 70% of working weight: 5 reps
- 85% of working weight: 2-3 reps
Safety First
Always use a spotter for heavy bench press sets, especially when working above 85% of your 1RM. If training alone, use safety pins or leave collars off so you can dump the plates in an emergency.
Range of Motion
For a valid rep, the bar must touch your chest (around nipple level) and lock out completely at the top with elbows extended. Maintain shoulder blade retraction throughout the movement.
Rest Periods
Rest 3-5 minutes between heavy sets (85%+ of 1RM). For hypertrophy work (70-80%), rest 2-3 minutes. Adequate rest ensures quality reps and prevents injury.
Training Frequency
Bench press 2-3 times per week for optimal strength gains. Allow at least 48 hours between heavy bench sessions for recovery. Vary intensity and volume across sessions.
Concrete Example
If you bench press 80 kg for 8 reps, your estimated 1RM is approximately 99 kg (Epley) or 97 kg (Brzycki), averaging 98 kg. For hypertrophy at 75%, you'd work with 73-74 kg for 8-10 reps. For strength at 85%, you'd use 83 kg for 4-6 reps.