One Rep Max for 20 kg × 9 reps

One Rep Max Calculator
One Rep Max for
lifted for
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What is the one rep max for 20 kg × 9 reps?

Answer

Lifting 20 kg for 9 reps gives an estimated one rep max of
26 kg

A set of 9 reps at 20 kg 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:

20 × (1 + 9 ÷ 30)

=

20 × 1.3

=

26 kg

Training Weights as a % of 1RM

Percentages of your estimated max of 26 kg, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%24.7 kg
90%23.4 kg
85%22.1 kg
80%20.8 kg
75%19.5 kg
70%18.2 kg
65%16.9 kg
60%15.6 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 20 kg × 9 reps:

FormulaEstimated 1RM
Epley26 kg
Brzycki25.7 kg
Lombardi24.9 kg
O'Conner24.5 kg
Wathan26.4 kg
Lander25.9 kg
Mayhew25.7 kg

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 20 kg × 9 reps? (The answer is: 26 kg). Enter the weight you lifted (e.g. 20), pick pounds or kilograms, and enter how many reps you managed (e.g. 9).
Recalculate with different values ↑

One Rep Max Table for 20 kg

RepsOne Rep Max% of 1RM
2 reps21.3 kg93.8%
3 reps22 kg90.9%
4 reps22.7 kg88.2%
5 reps23.3 kg85.7%
6 reps24 kg83.3%
7 reps24.7 kg81.1%
8 reps25.3 kg78.9%
9 reps26 kg76.9%
10 reps26.7 kg75%
11 reps27.3 kg73.2%
12 reps28 kg71.4%

FAQ

What is the one rep max for 20 kg × 9 reps?

Lifting 20 kg for 9 reps gives an estimated one rep max of 26 kg

How much of my max is 20 kg for 9 reps?

20 kg for 9 reps works out at 76.9% of an estimated one rep max of 26 kg.

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

90% of 26 kg is 23.4 kg and 70% is 18.2 kg. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also