One Rep Max Table: Estimated 1-rep max (Epley) by Weight lifted
Reference table of estimated 1-rep max (epley) for One Rep Max across a range of weight lifted values — exact, engine-computed figures you can read off at a glance.
One Rep Max Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Estimated 1-rep max (Epley)
93.3
- 1RM (Brzycki)
- 90.0
- 90% of 1RM
- 84.0
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the One Rep Max Calculator
The One Rep Max Calculator works out your estimated 1-rep max (epley), along with 2 related figures in an instant. Enter weight lifted and repetitions completed and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the weight lifted.
- Enter the repetitions completed.
- Read off your estimated 1-rep max (epley), together with 1rm (brzycki) and 90% of 1rm — the calculator updates automatically, with no button to press.
Formula
The One Rep Max Calculator uses the formula:
Estimated 1-rep max (Epley) = Weight lifted × (1 + Repetitions completed ÷ 30)
Worked example
For example, with weight lifted of 80 kg and repetitions completed of 5, the estimated 1-rep max (epley) is 93.3.
| Weight lifted | 80 kg |
|---|---|
| Repetitions completed | 5 |
| Estimated 1-rep max (Epley) | 93.3 |
|---|---|
| 1RM (Brzycki) | 90.0 |
| 90% of 1RM | 84.0 |
Results are estimates for educational use, not professional advice.
Key terms explained
- One rep max
- The maximum weight you can lift for a single repetition of an exercise (1RM).
Frequently asked questions
Your one rep max (1RM) is the heaviest weight you can lift for a single repetition of an exercise. It is a key measure of strength used to plan training.
Formulas predict it from a lighter set. The Epley formula is weight × (1 + reps ÷ 30). For 80 kg lifted 5 times it estimates about 93.3 kg.
Different formulas give slightly different estimates. Showing both gives you a sensible range rather than a single figure.
Estimates are most accurate at lower rep counts, roughly up to 10 reps. Beyond that they become less reliable, so use a set in the 3–8 rep range when possible.
The One Rep Max Calculator uses the formula: Estimated 1-rep max (Epley) = Weight lifted × (1 + Repetitions completed ÷ 30). For example, with weight lifted of 80 kg and repetitions completed of 5, the estimated 1-rep max (epley) is 93.3.
Enter the weight lifted. Enter the repetitions completed. Read off your estimated 1-rep max (epley), together with 1rm (brzycki) and 90% of 1rm — the calculator updates automatically, with no button to press.
Related guides
How to Calculate One Rep Max: Formula, Steps & Examples
Learn how to calculate One Rep Max — the formula explained step by step, with worked examples and a free calculator to check your answer.