Calculator
1RM Calculator
Estimate a one-rep max from a set you already did. Useful for planning percentages — not a reason to test a true max without good technique and a safe setup.
Last updated August 2026
Estimated 1RM (Epley)
70
This uses the Epley formula. Treat it as a planning number, not a challenge to test a true max without a spotter and good technique.
These tools provide estimates for educational purposes only. They are not medical advice, diagnosis, or a personalised nutrition or training prescription. Individual needs vary. If you have a medical condition, are pregnant, or take medication, speak with a qualified professional before making changes.
NKFitness content is for educational purposes only. It is not medical advice, diagnosis, or a substitute for care from a qualified professional. Training and nutrition needs vary. If you have an injury, medical condition, or eating-related concern, get personalised guidance before making major changes.
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