Bench Press Max Calculator
Estimate your 1RM bench from a rep set.
Enter your values
Enter the weight lifted in kg.
Enter the reps completed you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Estimated 1RM
- 94.5 kg
- Epley estimate
- 96 kg
- Brzycki estimate
- 92.9 kg
- Training weight (80%)
- 75.6 kg
| % of 1RM | Weight | Approx reps |
|---|---|---|
| 95% | 89.7 | 2 |
| 90% | 85 | 4 |
| 85% | 80.3 | 6 |
| 80% | 75.6 | 8 |
| 70% | 66.1 | 12 |
Quick answer
One-rep max is estimated from a submaximal set; Epley and Brzycki agree closely under about 10 reps.
Epley: 1RM = w x (1 + reps/30)
At a glance
| What it does | Estimate your 1RM bench from a rep set. |
|---|---|
| Category | Fitness |
| Inputs needed | Weight lifted, Reps completed |
| Main output | Estimated 1RM |
| Formula | Epley: 1RM = w x (1 + reps/30) |
| Cost | Free — no sign-up, no download |
How to use the Bench Press Max Calculator
- 1Perform a clean set to near failure with good form.
- 2Enter the weight and the number of reps you completed.
- 3Use the table to plan working sets.
Inputs explained
- Weight lifted(kg)
- Enter the weight lifted in kg.
- Reps completed
- Enter the reps completed you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Weight lifted80 kg
- Reps completed6
Results
- Estimated 1RM94.5 kg
- Epley estimate96 kg
- Brzycki estimate92.9 kg
- Training weight (80%)75.6 kg
Frequently asked questions
How accurate above 10 reps?
Accuracy drops sharply; use sets of 3-8 for the best estimate.
Should I test a true 1RM?
Only with a spotter and after a proper build-up; estimates are safer week to week.
What do I need to enter into the Bench Press Max Calculator?
Just 2 values: weight lifted, reps completed. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Bench Press Max Calculator work out the answer?
One-rep max is estimated from a submaximal set; Epley and Brzycki agree closely under about 10 reps. It applies the formula Epley: 1RM = w x (1 + reps/30) and shows the working so you can check each step by hand.
Is the Bench Press Max Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.