One-Rep Max Calculator
One-Rep Max Calculator
Your one-rep max (1RM) is the maximum weight you can lift for a single repetition with proper form. Knowing your 1RM helps you:
- Track strength progress accurately
- Set appropriate training weights
- Design personalized workout programs
This calculator uses the Brzycki formula, the most accurate equation for most lifters.
Your Estimated One-Rep Max:
Formulas used:
Brzycki: 1RM = w × (36 / (37 - r))
Epley: 1RM = w × (1 + 0.0333 × r)
Lombardi: 1RM = w × r^0.1
Note: This is an estimate. Always use a spotter when attempting maximal lifts. Your actual 1RM may vary based on exercise selection, fatigue, and other factors.