Iron

Strength and sport calculators

A rate-of-perceived-exertion chart you can load from, three powerlifting scores from the published coefficients, and a bowling sheet that knows a spare from a strike.

The RPE chart is the Reactive Training Systems table: a set of five at RPE 8 is 81.1% of one-rep max. It estimates a max from a set you already lifted, and it turns a target into a load.

DOTS, Wilks, and IPF GL all answer the same question with different math. Body weight and the total go in as kilograms. IPF GL rounds the coefficient to six decimals before multiplying, which is how the federation’s score sheets do it. Bowling follows ten-pin scoring: a strike picks up the next two balls, a spare picks up the next one.

Which calculator?

Every calculator in this cluster