1 Rep Max Calc 💪

Measure your raw power without the injury risk.

Accuracy drops significantly after 12 reps.

Formula Used

Your Estimated 1RM

253

LBS

Percentage Percentiles

95% (3RM)

240

90% (4RM)

228

85% (6RM)

215

80% (8RM)

202

Why Use the One Rep Max (1RM) Calculator?

Welcome to the One Rep Max (1RM) Calculator! Designed for speed, ease of use, and accuracy, this tool takes the guesswork out of complex scenarios and provides you with instant, reliable results.

Why calculate manually when you can automate? We built this tool to be universally accessible on mobile and desktop, ensuring you always have a reliable utility right in your pocket when you need a quick answer.

Key Features & Benefits

  • Fast & Reliable: Delivers instant outputs the moment you enter your data.
  • 100% Free: No paywalls, no hidden fees—just straightforward utility.
  • Privacy First: Your inputs are processed directly in your browser and never stored on our servers.
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