One Rep Max for 20 lbs × 3 reps

One Rep Max Calculator
One Rep Max for
lifted for
reps

What is the one rep max for 20 lbs × 3 reps?

Answer

Lifting 20 lbs for 3 reps gives an estimated one rep max of
22 lbs

A set of 3 reps at 20 lbs is

90.9%

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 + 3 ÷ 30)

=

20 × 1.1

=

22 lbs

Training Weights as a % of 1RM

Percentages of your estimated max of 22 lbs, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%20.9 lbs
90%19.8 lbs
85%18.7 lbs
80%17.6 lbs
75%16.5 lbs
70%15.4 lbs
65%14.3 lbs
60%13.2 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 20 lbs × 3 reps:

FormulaEstimated 1RM
Epley22 lbs
Brzycki21.2 lbs
Lombardi22.3 lbs
O'Conner21.5 lbs
Wathan21.9 lbs
Lander21.4 lbs
Mayhew22.8 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 20 lbs × 3 reps? (The answer is: 22 lbs). Enter the weight you lifted (e.g. 20), pick pounds or kilograms, and enter how many reps you managed (e.g. 3).
Recalculate with different values ↑

One Rep Max Table for 20 lbs

RepsOne Rep Max% of 1RM
2 reps21.3 lbs93.8%
3 reps22 lbs90.9%
4 reps22.7 lbs88.2%
5 reps23.3 lbs85.7%
6 reps24 lbs83.3%
7 reps24.7 lbs81.1%
8 reps25.3 lbs78.9%
9 reps26 lbs76.9%
10 reps26.7 lbs75%
11 reps27.3 lbs73.2%
12 reps28 lbs71.4%

FAQ

What is the one rep max for 20 lbs × 3 reps?

Lifting 20 lbs for 3 reps gives an estimated one rep max of 22 lbs

How much of my max is 20 lbs for 3 reps?

20 lbs for 3 reps works out at 90.9% of an estimated one rep max of 22 lbs.

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

90% of 22 lbs is 19.8 lbs and 70% is 15.4 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also