Bench Press One Rep Max Calculator
Estimate a bench press one rep maximum from a technically consistent set of one to 12 reps.
Enter your details
Enter your numbers, then select Calculate. Nothing is stored, sent, or transmitted.
- The result averages the Epley, Brzycki, and Lombardi estimates and also shows each formula separately.
- One rep max formulas are less reliable at high rep counts. Technique, pause standard, fatigue, equipment, and individual strength endurance all affect the result.
- The calculation runs in your browser. Nothing you enter is stored, sent, or transmitted.
What does this bench press one rep max calculator tell you?
Estimate a bench press one rep maximum from a technically consistent set of one to 12 reps.
The result averages the Epley, Brzycki, and Lombardi estimates and also shows each formula separately.
How to use the result
Use the result as a consistent planning number. Record the inputs with the answer so a later comparison uses the same method.
Recalculate when the underlying inputs change. Avoid comparing results created with different units, measurement methods, or machine settings.
Where the number stops being useful
One rep max formulas are less reliable at high rep counts. Technique, pause standard, fatigue, equipment, and individual strength endurance all affect the result.
What is the catch?
Check every entry and keep units consistent. When an input is uncertain, calculate a reasonable high and low case so you can see how much the answer depends on that number.
Nothing entered here is stored, sent, or transmitted. The calculation runs in your browser.
Common questions
Which formula is best?
No single formula is best for every lifter. Comparing several formulas shows the size of the estimate range.
Do I need to test a true max?
No. A well performed set of 12 reps or fewer can provide a useful planning estimate without a maximal attempt.
This calculator gives an estimate for general information. It is not medical advice and does not account for your full health history. Read the health disclaimer.