Estimate your maximum single-rep strength safely — no risky max-out needed.
One Rep Max is the maximum weight you can lift for a single repetition with proper form. It is a standard benchmark for measuring strength progress in exercises like bench press, squat, and deadlift.
Attempting an actual 1RM is risky — especially without a spotter. Using a sub-maximal lift (typically 60–80% of your true 1RM at 3–8 reps) gives an accurate estimate with zero injury risk.
Epley: weight × (1 + reps/30) · Brzycki: weight × 36/(37−reps) · Lander: weight × 100/(101.3 − 2.67×reps). This calculator shows the average of all three for maximum accuracy.
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