One Rep Max for 120 lbs × 8 reps

One Rep Max Calculator

One Rep Max for

lifted for

reps

What is the one rep max for 120 lbs × 8 reps?

Answer

Lifting 120 lbs for 8 reps gives an estimated one rep max of
152 lbs

A set of 8 reps at 120 lbs is

78.9%

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:

120 × (1 + 8 ÷ 30)

=

120 × 1.2667

=

152 lbs

Training Weights as a % of 1RM

Percentages of your estimated max of 152 lbs, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%144.4 lbs
90%136.8 lbs
85%129.2 lbs
80%121.6 lbs
75%114 lbs
70%106.4 lbs
65%98.8 lbs
60%91.2 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 120 lbs × 8 reps:

FormulaEstimated 1RM
Epley152 lbs
Brzycki149 lbs
Lombardi147.7 lbs
O'Conner144 lbs
Wathan153.9 lbs
Lander150.1 lbs
Mayhew151.5 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 120 lbs × 8 reps? (The answer is: 152 lbs). Enter the weight you lifted (e.g. 120), pick pounds or kilograms, and enter how many reps you managed (e.g. 8).

One Rep Max Calculator

One Rep Max for

lifted for

reps

One Rep Max Table for 120 lbs

RepsOne Rep Max% of 1RM
2 reps128 lbs93.8%
3 reps132 lbs90.9%
4 reps136 lbs88.2%
5 reps140 lbs85.7%
6 reps144 lbs83.3%
7 reps148 lbs81.1%
8 reps152 lbs78.9%
9 reps156 lbs76.9%
10 reps160 lbs75%
11 reps164 lbs73.2%
12 reps168 lbs71.4%

FAQ

What is the one rep max for 120 lbs × 8 reps?

Lifting 120 lbs for 8 reps gives an estimated one rep max of 152 lbs

How much of my max is 120 lbs for 8 reps?

120 lbs for 8 reps works out at 78.9% of an estimated one rep max of 152 lbs.

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

90% of 152 lbs is 136.8 lbs and 70% is 106.4 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also