PR Foundry

Built-in Tools

The barbell math, handled

Four calculators built for the gym floor. Load your bar, manage your maxes, and dial in effort, all on-device.

Plate Calculator

Enter a target weight and see exactly which plates to load on one side of the bar, drawn as a side-view diagram with gaps so duplicate plates are countable. Supports custom plate inventory, bar weight, and collars.

Plate calculator showing the plates to load on one side of the bar

1RM Manager

Store and update your estimated one-rep maxes per lift. These drive the weights in every generated plan.

1RM Manager screen listing stored one-rep maxes per lift

1RM Calculator

Estimate a 1RM from any weight × reps using Epley, Brzycki, or Lombardi, with a projected rep-max table.

1RM calculator estimating a one-rep max from weight and reps with a projected rep-max table

RPE / RIR Calculator

Enter a 1RM, working weight, and reps to get the implied RPE, reps-in-reserve, and percentage of 1RM.

RPE / RIR calculator showing implied RPE, reps in reserve, and percent of 1RM
Coming soon to theApp Store