Home » Calculators » One Rep Max Calculator

One Rep Max Calculator

The Epley formula estimates your one-rep max (1RM) from a lighter set: lift a weight for a few reps and it predicts the heaviest weight you could lift once. It works best for sets of 10 reps or fewer.

\u2014Estimated one-rep max (kg)

How to use

  1. Enter the weight you lifted in kilograms.
  2. Enter how many reps you completed.
  3. Click Calculate to see your estimated one-rep max.

Related tools

🕐

Age Calculator

Get your exact age in years, months, days and total days lived.

🕐

Percentage Calculator

Solve any percentage problem: X% of Y, ratios and % change.

📊

EMI Calculator

Work out your monthly EMI, total interest and total payment.

💪

BMI Calculator

Find your Body Mass Index and health category in seconds.