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    One Rep Max for 15 kg × 7 reps

    One Rep Max Calculator
    One Rep Max for
    lifted for
    reps

    What is the one rep max for 15 kg × 7 reps?

    Answer

    Lifting 15 kg for 7 reps gives an estimated one rep max of
    18.5 kg

    A set of 7 reps at 15 kg is

    81.1%

    of your estimated one rep max

    Note: this is an estimate, not a tested max. Rep-based formulas are closest at 2–6 reps and drift further apart as the set gets longer. Warm up and use a spotter before attempting a true single.

    How to Calculate One Rep Max

    Epley Formula: 1RM = weight × (1 + reps ÷ 30)

    The Epley formula assumes that every extra repetition you can complete corresponds to roughly 3.33% more weight on the bar. Put your set into it:

    15 × (1 + 7 ÷ 30)

    ≈

    15 × 1.2333

    ≈

    18.5 kg

    Training Weights as a % of 1RM

    Percentages of your estimated max of 18.5 kg, the way most strength programmes prescribe load:

    % of 1RMWorking Weight
    95%17.6 kg
    90%16.7 kg
    85%15.7 kg
    80%14.8 kg
    75%13.9 kg
    70%13 kg
    65%12 kg
    60%11.1 kg

    Other One Rep Max Formulas

    Published 1RM formulas disagree, and the gap widens with the rep count. This page answers with Epley; here is what the others give for 15 kg × 7 reps:

    FormulaEstimated 1RM
    Epley18.5 kg
    Brzycki18 kg
    Lombardi18.2 kg
    O'Conner17.6 kg
    Wathan18.7 kg
    Lander18.2 kg
    Mayhew18.6 kg

    Related Calculations

    See Also

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    What is my 1 rep max for 15 kg × 7 reps?. 15 kg for 7 reps gives an estimated one rep max of 18.5 kg. That set is 81.1% of your maximum — see the full rep table.
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    One Rep Max Table for 15 kg

    RepsOne Rep Max% of 1RM
    2 reps16 kg93.8%
    3 reps16.5 kg90.9%
    4 reps17 kg88.2%
    5 reps17.5 kg85.7%
    6 reps18 kg83.3%
    7 reps18.5 kg81.1%
    8 reps19 kg78.9%
    9 reps19.5 kg76.9%
    10 reps20 kg75%
    11 reps20.5 kg73.2%
    12 reps21 kg71.4%

    One Rep Max Calculator

    This calculator estimates your one-rep max (1RM) — the heaviest weight you could lift for a single repetition — from a set you have already completed. For example, it can help you find out what is the one rep max for 15 kg × 7 reps? (The answer is: 18.5 kg). Enter the weight you lifted (e.g. 15), pick pounds or kilograms, and enter how many reps you managed (e.g. 7).
    Recalculate with different values ↑

    FAQ

    What is the one rep max for 15 kg × 7 reps?

    Lifting 15 kg for 7 reps gives an estimated one rep max of 18.5 kg

    How much of my max is 15 kg for 7 reps?

    15 kg for 7 reps works out at 81.1% of an estimated one rep max of 18.5 kg.

    What should I lift at 90% and 70% of that max?

    90% of 18.5 kg is 16.7 kg and 70% is 13 kg. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

    See Also