Home / 1RM calculator
1RM calculator
Enter any set. Get your estimated one-rep max — the most you could lift once — without having to test it.
Units
Estimated 1-rep max
117 kg
Epley formula: weight × (1 + reps ÷ 30). Most accurate for sets of 10 reps or fewer.
What you could do for reps
| Reps | Weight | % of 1RM |
|---|
Which formula?
Brolic uses Epley, the most common estimate and the one our leaderboards rank by. A single (1 rep) is taken as your max exactly.
How does this help?
Estimated max lets a 100 kg × 10 set and a 110 kg single be compared fairly — so rep PRs count on the leaderboards.
Stop doing maths between sets
Brolic works out your max, your records and your rank automatically.