One Rep Max (1RM) Calculator
100% In-Browser PrivacyFull View
Loading tool…
🔒 Client-side only • Zero data uploaded⚡ Free & Private Tools by Yuitility
Loading tool…
Based on performing 100 kg for 5 repetitions.
| % 1RM | Weight (kg) | Estimated Rep Capacity |
|---|---|---|
| 95% | 109 kg | 1 – 2 reps |
| 90% | 104 kg | 3 – 4 reps |
| 85% | 98 kg | 5 – 6 reps |
| 80% | 92 kg | 7 – 8 reps |
| 75% | 86 kg | 9 – 10 reps |
| 70% | 81 kg | 11 – 12 reps |
| 65% | 75 kg | 15+ reps |
| 60% | 69 kg | 15+ reps |
| 50% | 58 kg | 15+ reps |