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    One Rep Max for 255 lbs × 7 reps

    One Rep Max Calculator
    One Rep Max for
    lifted for
    reps

    What is the one rep max for 255 lbs × 7 reps?

    Answer

    Lifting 255 lbs for 7 reps gives an estimated one rep max of
    314.5 lbs

    A set of 7 reps at 255 lbs 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:

    255 × (1 + 7 ÷ 30)

    ≈

    255 × 1.2333

    ≈

    314.5 lbs

    Training Weights as a % of 1RM

    Percentages of your estimated max of 314.5 lbs, the way most strength programmes prescribe load:

    % of 1RMWorking Weight
    95%298.8 lbs
    90%283.1 lbs
    85%267.3 lbs
    80%251.6 lbs
    75%235.9 lbs
    70%220.2 lbs
    65%204.4 lbs
    60%188.7 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 255 lbs × 7 reps:

    FormulaEstimated 1RM
    Epley314.5 lbs
    Brzycki306 lbs
    Lombardi309.8 lbs
    O'Conner299.6 lbs
    Wathan317.7 lbs
    Lander308.7 lbs
    Mayhew315.9 lbs

    Related Calculations

    See Also

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    What is my 1 rep max for 255 lbs × 7 reps?. 255 lbs for 7 reps gives an estimated one rep max of 314.5 lbs. That set is 81.1% of your maximum — see the full rep table.
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    One Rep Max Table for 255 lbs

    RepsOne Rep Max% of 1RM
    2 reps272 lbs93.8%
    3 reps280.5 lbs90.9%
    4 reps289 lbs88.2%
    5 reps297.5 lbs85.7%
    6 reps306 lbs83.3%
    7 reps314.5 lbs81.1%
    8 reps323 lbs78.9%
    9 reps331.5 lbs76.9%
    10 reps340 lbs75%
    11 reps348.5 lbs73.2%
    12 reps357 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 255 lbs × 7 reps? (The answer is: 314.5 lbs). Enter the weight you lifted (e.g. 255), 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 255 lbs × 7 reps?

    Lifting 255 lbs for 7 reps gives an estimated one rep max of 314.5 lbs

    How much of my max is 255 lbs for 7 reps?

    255 lbs for 7 reps works out at 81.1% of an estimated one rep max of 314.5 lbs.

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

    90% of 314.5 lbs is 283.1 lbs and 70% is 220.2 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

    See Also