This tool calculates your estimated one-rep max (1RM) based on the weight you can lift for multiple repetitions.

Enter the weight you lifted and the number of repetitions performed. Click 'Calculate' to find your estimated 1RM.

Enter your numbers above

Knowing your 1RM is crucial for powerlifting as it helps dictate training loads and peaking strategies for competitions.

Examples for Powerlifting

Squat Calculation Example
Estimated 1RM: 180 lbs
Based on a 5-rep max of 150 lbs, your estimated 1RM for the squat is 180 lbs.
Bench Press Calculation Example
Estimated 1RM: 110 lbs
With a 3-rep max of 100 lbs, your estimated 1RM for the bench press is 110 lbs.
Deadlift Calculation Example
Estimated 1RM: 190 lbs
For a 2-rep max of 180 lbs, your estimated 1RM for the deadlift is 190 lbs.

Why 1RM Matters

The one-rep max is a critical measurement in powerlifting, serving as a benchmark for strength and helping lifters gauge their progress. It informs training percentages and helps strategize for competition day.

How to Use the 1RM Calculator

To use the calculator, simply input the weight you lifted and the number of repetitions you performed for that lift. The tool will estimate your 1RM, which you can then use to adjust your training loads.

Common 1RM Calculation Methods

Several formulas exist for calculating 1RM, including the Epley and Brzycki formulas. Each method has its nuances, but they all aim to provide a reliable estimate of your maximum lifting capacity.

Tips for Powerlifting

  1. Use your 1RM to set training percentages for each lift.
  2. Reassess your 1RM regularly, especially before competitions.
  3. Consider fatigue and recovery when estimating your performance.

Track all your powerlifting metrics in FirstRep. Start free with up to 3 clients.

Frequently Asked Questions

What is 1RM?

1RM stands for one-rep max, the maximum weight you can lift for one repetition of a given exercise. It's a key metric in strength training.

How often should I calculate my 1RM?

It's best to recalculate your 1RM every 4-8 weeks, especially after a training cycle or prior to a competition.