One Rep Max for 115 lbs × 9 reps

One Rep Max Calculator
One Rep Max for
lifted for
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What is the one rep max for 115 lbs × 9 reps?

Answer

Lifting 115 lbs for 9 reps gives an estimated one rep max of
149.5 lbs

A set of 9 reps at 115 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:

115 × (1 + 9 ÷ 30)

=

115 × 1.3

=

149.5 lbs

Training Weights as a % of 1RM

Percentages of your estimated max of 149.5 lbs, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%142 lbs
90%134.6 lbs
85%127.1 lbs
80%119.6 lbs
75%112.1 lbs
70%104.7 lbs
65%97.2 lbs
60%89.7 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 115 lbs × 9 reps:

FormulaEstimated 1RM
Epley149.5 lbs
Brzycki147.9 lbs
Lombardi143.3 lbs
O'Conner140.9 lbs
Wathan151.5 lbs
Lander148.9 lbs
Mayhew147.9 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 115 lbs × 9 reps? (The answer is: 149.5 lbs). Enter the weight you lifted (e.g. 115), pick pounds or kilograms, and enter how many reps you managed (e.g. 9).
Recalculate with different values ↑

One Rep Max Table for 115 lbs

RepsOne Rep Max% of 1RM
2 reps122.7 lbs93.8%
3 reps126.5 lbs90.9%
4 reps130.3 lbs88.2%
5 reps134.2 lbs85.7%
6 reps138 lbs83.3%
7 reps141.8 lbs81.1%
8 reps145.7 lbs78.9%
9 reps149.5 lbs76.9%
10 reps153.3 lbs75%
11 reps157.2 lbs73.2%
12 reps161 lbs71.4%

FAQ

What is the one rep max for 115 lbs × 9 reps?

Lifting 115 lbs for 9 reps gives an estimated one rep max of 149.5 lbs

How much of my max is 115 lbs for 9 reps?

115 lbs for 9 reps works out at 76.9% of an estimated one rep max of 149.5 lbs.

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

90% of 149.5 lbs is 134.6 lbs and 70% is 104.7 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also