One Rep Max Calculator

By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results

One Rep Max Calculator — free online tool.

Interactive One Rep Max Calculator

JavaScript is required for the interactive calculator. Enable JavaScript to use this tool.

How to Use This Calculator

Step-by-Step Instructions

  1. Enter your weight lifted (lbs)
  2. Enter your reps performed
  3. Results appear instantly — no button needed

Formula

Mathematical Formula

See calculator

How It Works

See calculator

Frequently Asked Questions

How does this work?

Enter values for instant results.

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