Shocking 1RM Secrets: Estimate Your Max Lift Without Breaking a Sweat! | One rep max calculator

One Rep Max Calculator

This tool helps you estimate your one-rep maximum (1RM) based on the weight you lifted and the number of reps performed.
It's a safe way to gauge your strength without attempting a true max lift.

Enter the details below to calculate your estimated 1RM. Supports multiple formulas for accuracy.

Weight Lifted (in lbs or kg): Number of Reps (2-20): Select Formula: Epley (General Use) Brzycki (Higher Reps) Lombardi (Powerlifting) O'Conner Mayhew Wathen

How to Use This Tool

1. Enter the weight you lifted in your last set.
2. Input the number of reps you completed (between 2 and 20 for best accuracy).
3. Choose a formula based on your preference or exercise type.
4. Click 'Calculate 1RM' to see your estimated max and training percentages.
5. Use the result to plan your workouts safely.

Pros and Cons of Using a 1RM Calculator

Pros	Cons
Safe alternative to actual max testing	Estimates may not be 100% accurate for everyone
Helps track progress over time	Doesn't account for fatigue or form variations
Multiple formulas for better estimation	Limited to reps between 2-20
Free and easy to use	Not a substitute for professional coaching