An easy to use tool to calculate your theoretical 1 rep max. It will calculate this based on 2 to 15 reps and the weight lifted.

* Ad free

* Choose from 4 popular formulas

* Knowing your 1RM is great for planning your training program and great for motivation

* Percentages of your 1 rep max are given from 40% to 95% in 5% steps

* Easily share your latest lift with your trainer and friends using the share function

* Use imperial or metric units and the 1RM calculation is given in both lbs and Kgs

* Save any calculations you want to keep with your own description and a time stamp

Includes an easy plate calculator, simply input your bar weight (with clips) which is automatically saved for future calculations (lb or Kg defaults can both be saved) and select your plate weights, up to 4 plates each side.

Just 1 click to transfer this to the 1 rep max calculator