1RM calculator
A one-off estimate you can save straight into your log.
Uses the Epley formula: weight × (1 + reps ÷ 30).
BACK SQUAT — ESTIMATED 1RM
— kg
Enter a weight and rep count to calculate.
| % of max | Working weight | Typical use |
|---|---|---|
| 95% | — | 1–2 rep singles |
| 85% | — | 3–5 rep sets |
| 75% | — | Main block work |
| 65% | — | Warm-up / technique |