One Rep Max for 90 lbs × 12 reps

One Rep Max Calculator

One Rep Max for

lifted for

reps

What is the one rep max for 90 lbs × 12 reps?

Answer

Lifting 90 lbs for 12 reps gives an estimated one rep max of
126 lbs

A set of 12 reps at 90 lbs is

71.4%

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:

90 × (1 + 12 ÷ 30)

=

90 × 1.4

=

126 lbs

Training Weights as a % of 1RM

Percentages of your estimated max of 126 lbs, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%119.7 lbs
90%113.4 lbs
85%107.1 lbs
80%100.8 lbs
75%94.5 lbs
70%88.2 lbs
65%81.9 lbs
60%75.6 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 90 lbs × 12 reps:

FormulaEstimated 1RM
Epley126 lbs
Brzycki129.6 lbs
Lombardi115.4 lbs
O'Conner117 lbs
Wathan127.8 lbs
Lander130 lbs
Mayhew121.9 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 90 lbs × 12 reps? (The answer is: 126 lbs). Enter the weight you lifted (e.g. 90), pick pounds or kilograms, and enter how many reps you managed (e.g. 12).

One Rep Max Calculator

One Rep Max for

lifted for

reps

One Rep Max Table for 90 lbs

RepsOne Rep Max% of 1RM
2 reps96 lbs93.8%
3 reps99 lbs90.9%
4 reps102 lbs88.2%
5 reps105 lbs85.7%
6 reps108 lbs83.3%
7 reps111 lbs81.1%
8 reps114 lbs78.9%
9 reps117 lbs76.9%
10 reps120 lbs75%
11 reps123 lbs73.2%
12 reps126 lbs71.4%

FAQ

What is the one rep max for 90 lbs × 12 reps?

Lifting 90 lbs for 12 reps gives an estimated one rep max of 126 lbs

How much of my max is 90 lbs for 12 reps?

90 lbs for 12 reps works out at 71.4% of an estimated one rep max of 126 lbs.

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

90% of 126 lbs is 113.4 lbs and 70% is 88.2 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also