One Rep Max for 115 kg × 8 reps

One Rep Max Calculator
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What is the one rep max for 115 kg × 8 reps?

Answer

Lifting 115 kg for 8 reps gives an estimated one rep max of
145.7 kg

A set of 8 reps at 115 kg is

78.9%

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:

115 × (1 + 8 ÷ 30)

≈

115 × 1.2667

≈

145.7 kg

Training Weights as a % of 1RM

Percentages of your estimated max of 145.7 kg, the way most strength programmes prescribe load:

% of 1RMWorking Weight
95%138.4 kg
90%131.1 kg
85%123.8 kg
80%116.5 kg
75%109.3 kg
70%102 kg
65%94.7 kg
60%87.4 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 115 kg × 8 reps:

FormulaEstimated 1RM
Epley145.7 kg
Brzycki142.8 kg
Lombardi141.6 kg
O'Conner138 kg
Wathan147.4 kg
Lander143.9 kg
Mayhew145.2 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 115 kg × 8 reps? (The answer is: 145.7 kg). Enter the weight you lifted (e.g. 115), pick pounds or kilograms, and enter how many reps you managed (e.g. 8).
Recalculate with different values ↑

One Rep Max Table for 115 kg

RepsOne Rep Max% of 1RM
2 reps122.7 kg93.8%
3 reps126.5 kg90.9%
4 reps130.3 kg88.2%
5 reps134.2 kg85.7%
6 reps138 kg83.3%
7 reps141.8 kg81.1%
8 reps145.7 kg78.9%
9 reps149.5 kg76.9%
10 reps153.3 kg75%
11 reps157.2 kg73.2%
12 reps161 kg71.4%

FAQ

What is the one rep max for 115 kg × 8 reps?

Lifting 115 kg for 8 reps gives an estimated one rep max of 145.7 kg

How much of my max is 115 kg for 8 reps?

115 kg for 8 reps works out at 78.9% of an estimated one rep max of 145.7 kg.

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

90% of 145.7 kg is 131.1 kg and 70% is 102 kg. Heavy strength work usually sits at 85–95%, while volume and technique work sits nearer 65–75%.

See Also