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About the One Rep Max Calculator
Estimate one-repetition maximum from weight lifted and repetitions. This Caluler tool is designed for quick, transparent calculations with clearly labeled inputs.
How to use
- Enter the values requested above.
- Check the units and assumptions.
- Click Calculate to see your result instantly.
Formula & assumptions
Epley estimate: 1RM ≈ weight × (1 + reps/30).
Who can use this calculator?
This free online calculator is useful for students, professionals, businesses, creators and everyday users who need a quick answer. Results depend on the information entered and the assumptions described above.
Keywords
one rep max calculator, 1RM calculator, bench press max calculator, lifting max
Important note
This tool provides estimates or mathematical results for general informational purposes. For financial, health, legal or other high-stakes decisions, verify the result with a qualified professional or authoritative source.