Estimated 1RM
93 kg
85% (strength)
79 kg
75% (hypertrophy)
70 kg
65% (volume)
61 kg
How to use it
Use your estimated 1RM to choose working weights. Many programs prescribe training as a percentage of 1RM.
Best practice
Use a set of 3–8 reps for the most stable estimate. Avoid going to failure and prioritize good technique.
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After you get your result, compare a few scenarios or explore related tools.
This calculator estimates one rep max (1RM) from a submaximal set. You enter a weight and reps, and the calculator estimates the single-rep equivalent.
If you’re pairing strength training with a nutrition goal, estimate maintenance calories with the TDEE Calculator and set a sustainable target using the Calorie Deficit Calculator.
Epley
1RM = weight × (1 + reps ÷ 30)
Brzycki
1RM = weight × (36 ÷ (37 − reps))
For higher reps, estimates can vary more. Use a consistent method over time to compare progress.
Example: 80 kg for 5 reps.
Epley: 1RM ≈ 80 × (1 + 5/30) ≈ 93 kg
85% training load ≈ 79 kg
For general health context, you can also track body metrics using the BMI Calculator.
If you’re combining training with a body composition goal, these tools help with planning:
Browse more tools in this category or return to the ClearCalculate homepage.