One Rep Max for 455 lbs × 7 reps

One Rep Max Calculator
One Rep Max for
lifted for
reps

What is the one rep max for 455 lbs × 7 reps?

Answer

Lifting 455 lbs for 7 reps gives an estimated one rep max of
561.2 lbs

A set of 7 reps at 455 lbs is

81.1%

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:

455 × (1 + 7 ÷ 30)

≈

455 × 1.2333

≈

561.2 lbs

Training Weights as a % of 1RM

Percentages of your estimated max of 561.2 lbs, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%533.1 lbs
90%505.1 lbs
85%477 lbs
80%448.9 lbs
75%420.9 lbs
70%392.8 lbs
65%364.8 lbs
60%336.7 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 455 lbs × 7 reps:

FormulaEstimated 1RM
Epley561.2 lbs
Brzycki546 lbs
Lombardi552.7 lbs
O'Conner534.6 lbs
Wathan566.8 lbs
Lander550.8 lbs
Mayhew563.7 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 455 lbs × 7 reps? (The answer is: 561.2 lbs). Enter the weight you lifted (e.g. 455), pick pounds or kilograms, and enter how many reps you managed (e.g. 7).
Recalculate with different values ↑

One Rep Max Table for 455 lbs

RepsOne Rep Max% of 1RM
2 reps485.3 lbs93.8%
3 reps500.5 lbs90.9%
4 reps515.7 lbs88.2%
5 reps530.8 lbs85.7%
6 reps546 lbs83.3%
7 reps561.2 lbs81.1%
8 reps576.3 lbs78.9%
9 reps591.5 lbs76.9%
10 reps606.7 lbs75%
11 reps621.8 lbs73.2%
12 reps637 lbs71.4%

FAQ

What is the one rep max for 455 lbs × 7 reps?

Lifting 455 lbs for 7 reps gives an estimated one rep max of 561.2 lbs

How much of my max is 455 lbs for 7 reps?

455 lbs for 7 reps works out at 81.1% of an estimated one rep max of 561.2 lbs.

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

90% of 561.2 lbs is 505.1 lbs and 70% is 392.8 lbs. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also