One Rep Max for 12.5 kg × 6 reps

One Rep Max Calculator

One Rep Max for

lifted for

reps

What is the one rep max for 12.5 kg × 6 reps?

Answer

Lifting 12.5 kg for 6 reps gives an estimated one rep max of
15 kg

A set of 6 reps at 12.5 kg is

83.3%

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:

12.5 × (1 + 6 ÷ 30)

=

12.5 × 1.2

=

15 kg

Training Weights as a % of 1RM

Percentages of your estimated max of 15 kg, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%14.3 kg
90%13.5 kg
85%12.8 kg
80%12 kg
75%11.3 kg
70%10.5 kg
65%9.8 kg
60%9 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 12.5 kg × 6 reps:

FormulaEstimated 1RM
Epley15 kg
Brzycki14.5 kg
Lombardi15 kg
O'Conner14.4 kg
Wathan15.1 kg
Lander14.7 kg
Mayhew15.2 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 12.5 kg × 6 reps? (The answer is: 15 kg). Enter the weight you lifted (e.g. 12.5), pick pounds or kilograms, and enter how many reps you managed (e.g. 6).

One Rep Max Calculator

One Rep Max for

lifted for

reps

One Rep Max Table for 12.5 kg

RepsOne Rep Max% of 1RM
2 reps13.3 kg93.8%
3 reps13.8 kg90.9%
4 reps14.2 kg88.2%
5 reps14.6 kg85.7%
6 reps15 kg83.3%
7 reps15.4 kg81.1%
8 reps15.8 kg78.9%
9 reps16.3 kg76.9%
10 reps16.7 kg75%
11 reps17.1 kg73.2%
12 reps17.5 kg71.4%

FAQ

What is the one rep max for 12.5 kg × 6 reps?

Lifting 12.5 kg for 6 reps gives an estimated one rep max of 15 kg

How much of my max is 12.5 kg for 6 reps?

12.5 kg for 6 reps works out at 83.3% of an estimated one rep max of 15 kg.

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

90% of 15 kg is 13.5 kg and 70% is 10.5 kg. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.