Bench press 1RM from 80 kg for 8 reps

Q: What is my bench max if I can do 80 kg for 8?

On the bench press, 80 kg for 8 reps gives an estimated 1RM of 101.3 kg with Epley. Brzycki gives somewhat less. Treat the range between the two as your likely max if those 8 reps were close to failure.

Q: What weight should I use for strength work on the bench?

On the bench press, 80 kg for 8 reps gives an estimated 1RM of 101.3 kg with Epley. For sets of 3 to 5, between 80 and 90% of that figure. The table above already lists those loads.

By Jesús Narváez Tamés · Published on October 28, 2026

What your bench press max would be if you do 80 kg for 8 reps, with Epley and Brzycki and the loads for strength and hypertrophy sets.

101.3kg

Brzycki: 99.3 kg

Exercise: Bench press
Weight lifted: 80 kg
Reps: 8
Formula: Epley
90% of 1RM: 91.2 kg
80% of 1RM: 81.1 kg
70% of 1RM: 70.9 kg

On the bench it is common to train between 6 and 10 reps and never know your max. This example takes a set of 80 kg for 8 reps, an intermediate level for many people with a couple of years of lifting, and turns it into an estimated 1RM.

At 8 reps the formulas start to drift a bit more than at 5, which is why Epley and Brzycki are both shown. If you go for a real max, have a spotter and climb in small jumps from 90%.

How this was calculated

Epley: 1RM = weight × (1 + reps / 30). It is an estimate, reliable up to about 10 reps taken close to failure. Brzycki (weight × 36 / (37 − reps)) is shown for contrast: if the two drift apart, the set had more reps than the formula handles well.

Nearby values

The same calculation changing only the weight. The highlighted row is this example.

Weight	Result
70 kg	88.7 kg	Brzycki: 86.9 kg
75 kg	95.0 kg	Brzycki: 93.1 kg
80 kg	101.3 kg	Brzycki: 99.3 kg
85 kg	107.7 kg	Brzycki: 105.5 kg
90 kg	114.0 kg	Brzycki: 111.7 kg

Adjust it to your numbers

The calculator starts from this example. If you change a field, that value is saved only on this device.

Units

Weight lifted (lb)

Reps performed

Formula

Estimated 1RM

223.4lb

Percentage table

1 reps
100 %
223.4 lb
2 reps
95 %
209.4 lb
3 reps
92 %
203.1 lb
4 reps
89 %
197.1 lb
5 reps
86 %
191.5 lb
6 reps
83 %
186.2 lb
8 reps
78 %
176.4 lb
10 reps
75 %
167.6 lb
12 reps
70 %
159.6 lb

Max (1-2 reps) (≥90%) Strength (3-5 reps) (80-89%) Hypertrophy (6-12 reps) (70-79%) Volume (60-69%) Endurance (<60%)

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Disclaimer: this calculator provides educational information and estimates based on standard formulas. It is not a substitute for personalised advice from a doctor, nutritionist or trainer. Consult a professional before making significant changes to your diet or training.

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Frequently asked questions

What is my bench max if I can do 80 kg for 8?+

On the bench press, 80 kg for 8 reps gives an estimated 1RM of 101.3 kg with Epley. Brzycki gives somewhat less. Treat the range between the two as your likely max if those 8 reps were close to failure.

What weight should I use for strength work on the bench?+

On the bench press, 80 kg for 8 reps gives an estimated 1RM of 101.3 kg with Epley. For sets of 3 to 5, between 80 and 90% of that figure. The table above already lists those loads.

Worked examples

A specific profile, with the number already done. Open it if it looks like you, then adjust.