Strength Prophet — 1RM Calculator
Predict your one-rep max with the Brzycki formula and get an instant warm-up plan.
Estimated 1RM (Brzycki)
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Formula
1RM = Weight × 36 / (37 − Reps)
Accuracy Note
Best for ≤10 reps. 11–20 gives a rough estimate.
Warm-Up Set Generator
Built from your estimated 1RM. Adjust rounding above to match your plates.
| Set | Intensity | Suggested Weight | Reps | Rest |
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