One Rep Max for 55 lbs × 7 reps

One Rep Max Calculator
One Rep Max for
lifted for
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What is the one rep max for 55 lbs × 7 reps?

Answer

Lifting 55 lbs for 7 reps gives an estimated one rep max of
67.8 lbs

A set of 7 reps at 55 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:

55 × (1 + 7 ÷ 30)

≈

55 × 1.2333

≈

67.8 lbs

Training Weights as a % of 1RM

Percentages of your estimated max of 67.8 lbs, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%64.4 lbs
90%61.1 lbs
85%57.7 lbs
80%54.3 lbs
75%50.9 lbs
70%47.5 lbs
65%44.1 lbs
60%40.7 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 55 lbs × 7 reps:

FormulaEstimated 1RM
Epley67.8 lbs
Brzycki66 lbs
Lombardi66.8 lbs
O'Conner64.6 lbs
Wathan68.5 lbs
Lander66.6 lbs
Mayhew68.1 lbs

Related Calculations

See Also

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 55 lbs × 7 reps? (The answer is: 67.8 lbs). Enter the weight you lifted (e.g. 55), pick pounds or kilograms, and enter how many reps you managed (e.g. 7).
Recalculate with different values ↑

One Rep Max Table for 55 lbs

RepsOne Rep Max% of 1RM
2 reps58.7 lbs93.8%
3 reps60.5 lbs90.9%
4 reps62.3 lbs88.2%
5 reps64.2 lbs85.7%
6 reps66 lbs83.3%
7 reps67.8 lbs81.1%
8 reps69.7 lbs78.9%
9 reps71.5 lbs76.9%
10 reps73.3 lbs75%
11 reps75.2 lbs73.2%
12 reps77 lbs71.4%

FAQ

What is the one rep max for 55 lbs × 7 reps?

Lifting 55 lbs for 7 reps gives an estimated one rep max of 67.8 lbs

How much of my max is 55 lbs for 7 reps?

55 lbs for 7 reps works out at 81.1% of an estimated one rep max of 67.8 lbs.

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

90% of 67.8 lbs is 61.1 lbs and 70% is 47.5 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also