1RM Calculator: Estimate Your One Rep Max Instantly
Calculate your strength level using the most accurate 1RM formula. Estimate your max safely and plan smarter training cycles.
Your Strength Level
Advanced
Estimated 1RM: 87
Your 1RM Training Weights
% of 1RM
Weight
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How to Use the Strength Level Calculator
Calculate your strength level in under 30 seconds
01
Enter the weight you lifted and the number of reps performed.
02
Add your bodyweight to estimate your one-rep max (1RM).
03
Instantly see your strength level based on proven standards.
Strength Level Standards
Compare your strength to real lifting benchmarks
Strength levels are determined by how much you lift relative to your bodyweight. These standards help you understand where you stand compared to other lifters.
Level
Beginner
New to structured strength training
Level
Novice
Developing consistent strength
Level
Intermediate
Stronger than most gym-goers
Level
Advanced
Top percentage of recreational lifters
Level
Elite
Competitive or near-competitive level
Your 1RM Training Percentages
Use these percentages of your estimated 1RM to plan effective training sessions.
% of 1RM
Weight
Use Case
100%
87,4
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90%
78,7
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80%
69,9
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60%
61,2
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50%
52,4
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The Math Behind Your Strength Level
This calculator estimates your one-rep max (1RM) using proven formulas widely used in strength training.
Epley Formula
1RM = Weight × (1 + Reps / 30)
Brzycki Formula
1RM = Weight × 36 / (37 − Reps)
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