Calculator
Result
Answer will appear hereEnter the values above and press Calculate to see the answer, step-by-step solution, and formula used.
How the result is calculated
1RM estimates from Epley or Brzycki formulas
One Rep Max Calculator
Use this calculator to calculate one rep max using a clear formula and simple inputs.
Explanation
What this calculator does
One Rep Max Calculator helps you calculate the result using clear inputs, a formula, and practical examples.
This calculator is for general information only and is not medical advice or a diagnosis.
How LearnLinx Calculates This Result
Formula
1RM estimates from Epley or Brzycki formulas
Enter your values and press Calculate to see each computation step with your numbers plugged into this formula.
Example
Enter your values, calculate the result, and review the formula used for the answer.
When to use it
Use it when you need a quick result for study, planning, documentation, or checking a manual calculation.
Common mistakes
- Estimating from sets above about 12 reps.
- Using bounced or incomplete repetitions as true reps.
- Jumping straight to a calculated max without a safe ramp-up.
Frequently asked questions
Which formula should I use?
Epley and Brzycki are both common. Try both; estimates diverge more as reps increase.
Why is the rep limit 12?
Higher-rep sets make 1RM estimates less reliable for strength training.
What formula does the One Rep Max Calculator use?
It uses: 1RM estimates from Epley or Brzycki formulas. The result page also shows a step-by-step breakdown of how your answer was calculated.
Is the One Rep Max Calculator free to use?
Yes. All LearnLinx calculators are completely free with no signup required. Signing in is optional and only adds a 60-day history of your calculations.
Is this medical advice?
No. This calculator provides general information only and is not medical advice or a diagnosis. Consult a qualified health professional for personal guidance.