One Rep Max for 90 kg × 12 reps

One Rep Max Calculator

One Rep Max for

lifted for

reps

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

Answer

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

A set of 12 reps at 90 kg 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 kg

Training Weights as a % of 1RM

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

% of 1RMWorking Weight
95%119.7 kg
90%113.4 kg
85%107.1 kg
80%100.8 kg
75%94.5 kg
70%88.2 kg
65%81.9 kg
60%75.6 kg

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 kg × 12 reps:

FormulaEstimated 1RM
Epley126 kg
Brzycki129.6 kg
Lombardi115.4 kg
O'Conner117 kg
Wathan127.8 kg
Lander130 kg
Mayhew121.9 kg

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 kg × 12 reps? (The answer is: 126 kg). 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 kg

RepsOne Rep Max% of 1RM
2 reps96 kg93.8%
3 reps99 kg90.9%
4 reps102 kg88.2%
5 reps105 kg85.7%
6 reps108 kg83.3%
7 reps111 kg81.1%
8 reps114 kg78.9%
9 reps117 kg76.9%
10 reps120 kg75%
11 reps123 kg73.2%
12 reps126 kg71.4%

FAQ

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

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

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

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

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

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