1RM Bench Press Calculator
Calculate your estimated 1 rep max bench press, squat, and deadlift with our free Epley 1RM Bench Press Calculator. Powered by the Epley 1RM formula equation, estimate your single-rep lifting capacity from submaximal repetition sets.
1RM Bench Press Calculator
1RM Bench Press Calculator
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Calculation Results Summary
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Epley Strength Reference
Epley 1RM Bench Press Calculator & 1 Rep Max Reference Tool
Calculate your estimated 1 rep max bench press, squat, and deadlift with our free Epley 1RM Bench Press Calculator. Powered by the Epley 1RM formula equation, estimate your single-rep lifting capacity from submaximal repetition sets.
Epley 1RM Mathematical Formula Equation
1RM = W × (1 + R / 30)1RM = Weight Lifted in kg/lbs × (1 + [Reps Performed / 30]) | Brzycki 1RM = Weight Lifted × [36 / (37 - Reps)]
1RM Percentage Intensity Training Chart (Bench Press & Powerlifting)
Peak single rep strength capacity estimate
Heavy strength building & neural adaptation
Common training use & compound strength (5x5 protocols)
Hypertrophy volume & metabolic conditioning
Muscular endurance & active recovery sets
| Category / Level | Reference Range / Metric | Reference Context |
|---|---|---|
| 100% 1RM Baseline | 1 Repetition | Peak single rep strength capacity estimate |
| 90% 1RM Load | 3 Repetitions | Heavy strength building & neural adaptation |
| 85% 1RM Load | 5 – 6 Repetitions | Common training use & compound strength (5x5 protocols) |
| 75% 1RM Load | 10 Repetitions | Hypertrophy volume & metabolic conditioning |
| 65% 1RM Load | 15 Repetitions | Muscular endurance & active recovery sets |
Frequently Asked Questions
What is the Epley 1RM Bench Press Calculator?
The Epley 1RM Bench Press Calculator is a strength assessment tool created by Boyd Epley in 1985. It calculates your estimated maximum single-rep bench press (1RM) based on submaximal repetition performance.
How to calculate 1 rep max bench press using the Epley formula?
To calculate your 1RM bench press: Lift a manageable weight for submaximal reps (e.g. 100 kg for 5 reps). Multiply 100 by (1 + 5/30), which equals 100 × 1.1667 = 116.7 kg estimated 1RM bench press.
How accurate is the Epley 1RM formula for bench press, squat, and deadlift?
Formula-based estimates can differ from actual one-repetition performance. The Epley 1RM formula provides reliable reference estimates for bench press and squat sets between 2 to 10 repetitions.
What is the difference between Epley and Brzycki 1RM formulas?
The Epley formula (1RM = W × [1 + R/30]) and Brzycki formula (1RM = W × [36 / (37 - R)]) are two widely referenced formulas. Epley is commonly used for lower rep ranges (1 to 6 reps), while Brzycki performs well up to 10 reps.
Why use a 1RM calculator instead of testing max weight directly?
Testing true 1RM max weight creates significant spinal and tendon strain during heavy bench press attempts. An Epley 1RM calculator allows lifters to estimate reference target weights using submaximal loads.
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