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  2. Health & Fitness
  3. One Rep Max Calculator

One Rep Max Calculator

Weight training capacity solver.

Loading lifting maxes...

How to Use the One Rep Max Calculator

  • 1Enter weight lifted.
  • 2Input completed reps.
  • 3Read calculated 1RM.

Calculation Formula & Mathematical Definition

Epley: W * (1 + R / 30).

Step-by-Step Worked Example

Lifting 100 lbs for 5 reps gives ~117 lbs 1RM.

Frequently Asked Questions

How do I use the One Rep Max Calculator?

Enter your values into the input fields and the calculator will compute the result automatically and display it below.

Are the results from the One Rep Max Calculator accurate?

Yes, results are based on standard formulas. They are estimates only and should be verified with a qualified professional for official purposes.

Was this calculator helpful?

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Estimate Only

Calculations on this website are automatic estimates and do not represent guaranteed financial, tax, or legal returns. Please verify details with certified specialists.