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    7. One Rep Max Calculator (1RM)

    One Rep Max Calculator (1RM)

    Calculate the maximum weight you can lift for one repetition using Epley, Brzycki, and Lombardi formulas.

    Enter data

    60 kg
    60 kg
    8
    8

    Results

    Estimated 1RM
    74.8
    kg
    Average

    Training Weights

    Epley Formula
    76.0 kg
    Brzycki Formula
    74.5 kg
    Lombardi Formula
    73.9 kg

    Training Weights

    % of 1RMWeightApprox. Reps
    95%
    71.0 kg~2 Reps Performed
    90%
    67.3 kg~4 Reps Performed
    85%
    63.6 kg~6 Reps Performed
    80%
    59.8 kg~8 Reps Performed
    75%
    56.1 kg~10 Reps Performed
    70%
    52.3 kg~12 Reps Performed
    65%
    48.6 kg~15 Reps Performed
    60%
    44.9 kg~18 Reps Performed
    55%
    41.1 kg~20 Reps Performed
    50%
    37.4 kg~25 Reps Performed

    About 1RM

    One Rep Max (1RM) is the maximum weight you can lift for one complete repetition of a given exercise. It's a key metric for strength training.

    Formula::

    Epley Formula:
    Epley: weight × (1 + reps/30)
    Brzycki Formula:
    Brzycki: weight × 36/(37 - reps)
    Lombardi Formula:
    Lombardi: weight × reps^0.10

    How do I use the percentage table?

    The table shows weights for different training goals: 85-100% for strength, 67-85% for hypertrophy (muscle growth), below 67% for endurance.

    This calculator provides an estimate. Never attempt an actual 1RM without a spotter and proper warm-up.

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