Lifting Calculator

One rep max calculator, Sinclair calculator, and Wilks score calculator.

Lifting Calculator contains three convenient and easy to use lifting calculators to make calculating various strength related metrics, allowing you to focus on hitting your goals.

*One Rep Max Calculator

The one rep max calculator uses percentages to estimate your one rep max (and rep maxes up to 10). This tool is most accurate for the compound strength movements including squats, deadlifts, and presses.

*Sinclair Calculator

The Sinclair Total is a means to compare different weight classes in Olympic Weightlifting by standardizing lifters’ totals. Additionally, our tool shows how your Sinclair Total compares to the world record Sinclair Total for your gender and weight class.

*Wilks Calculator

The Wilks Score is a means to compare different weight classes in Powerlifting contests by standardizing lifters’ totals.