One-rep max estimate (1RM)

Enter a load you can lift several times and how many reps you did. The tool estimates your maximum without testing it.

General information, not medical advice. This result does not replace a doctor. If in doubt or if you have symptoms, see a health professional.

Result

94.5Estimated max (kg)

Epley formula (kg): 96
Brzycki formula (kg): 92.9
100% — about 1 rep (kg): 94.5
95% — about 2 reps (kg): 89.7
90% — about 4 reps (kg): 85
85% — about 6 reps (kg): 80.3
80% — about 8 reps (kg): 75.6
75% — about 10 reps (kg): 70.8
70% — about 12 reps (kg): 66.1
60% — about 15 reps (kg): 56.7; This is an estimate. There is no need to test this maximum: the table helps you pick lighter loads.

Epley: max = load × (1 + reps ÷ 30).

Estimated max (kg)

94.5

How it is calculated

80 kg lifted 6 times: Epley 96 kg, Brzycki 92.9 kg, average 94.5 kg.

The formulas are less reliable above 10 reps.
Results vary with the exercise, fatigue and technique.
After an injury, with pain or a health condition, ask a professional before lifting heavy.

Estimate a one-rep max from a submaximal set without attempting a maximal lift.
Compare Epley and Brzycki estimates, then choose a lighter training load.
When tracking strength training, also note the exercise, range of motion and technique.

What does 1RM mean?

It is the estimated heaviest load someone could lift once for a given exercise. This tool estimates it from a lighter set.

Why do Epley and Brzycki give different results?

The formulas use different equations. Their average is an intermediate estimate, not a tested measurement.

Do I need to test my actual maximum?

No. A maximal test is not necessary and may increase injury risk. The table is for choosing lighter training loads.