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    One Rep Max for 100 lbs × 9 reps

    One Rep Max Calculator
    One Rep Max for
    lifted for
    reps

    What is the one rep max for 100 lbs × 9 reps?

    Answer

    Lifting 100 lbs for 9 reps gives an estimated one rep max of
    130 lbs

    A set of 9 reps at 100 lbs is

    76.9%

    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:

    100 × (1 + 9 ÷ 30)

    =

    100 × 1.3

    =

    130 lbs

    Training Weights as a % of 1RM

    Percentages of your estimated max of 130 lbs, the way most strength programmes prescribe load:

    % of 1RMWorking Weight
    95%123.5 lbs
    90%117 lbs
    85%110.5 lbs
    80%104 lbs
    75%97.5 lbs
    70%91 lbs
    65%84.5 lbs
    60%78 lbs

    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 100 lbs × 9 reps:

    FormulaEstimated 1RM
    Epley130 lbs
    Brzycki128.6 lbs
    Lombardi124.6 lbs
    O'Conner122.5 lbs
    Wathan131.8 lbs
    Lander129.4 lbs
    Mayhew128.6 lbs

    Related Calculations

    See Also

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    What is my 1 rep max for 100 lbs × 9 reps?. 100 lbs for 9 reps gives an estimated one rep max of 130 lbs. That set is 76.9% of your maximum — see the full rep table.
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    One Rep Max Table for 100 lbs

    RepsOne Rep Max% of 1RM
    2 reps106.7 lbs93.8%
    3 reps110 lbs90.9%
    4 reps113.3 lbs88.2%
    5 reps116.7 lbs85.7%
    6 reps120 lbs83.3%
    7 reps123.3 lbs81.1%
    8 reps126.7 lbs78.9%
    9 reps130 lbs76.9%
    10 reps133.3 lbs75%
    11 reps136.7 lbs73.2%
    12 reps140 lbs71.4%

    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 100 lbs × 9 reps? (The answer is: 130 lbs). Enter the weight you lifted (e.g. 100), pick pounds or kilograms, and enter how many reps you managed (e.g. 9).
    Recalculate with different values ↑

    FAQ

    What is the one rep max for 100 lbs × 9 reps?

    Lifting 100 lbs for 9 reps gives an estimated one rep max of 130 lbs

    How much of my max is 100 lbs for 9 reps?

    100 lbs for 9 reps works out at 76.9% of an estimated one rep max of 130 lbs.

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

    90% of 130 lbs is 117 lbs and 70% is 91 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

    See Also