STRENGTH CALCULATORS

1RM Calculator

Estimate your one-rep max from any set, with a full percentage-of-1RM table.

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Plate Calculator

See exactly which plates to load on the bar for any target weight.

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RPE Chart

Convert RPE and reps into a percentage of your 1RM and a target weight.

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TRAIN WITH THE FULL APP

Cornerstone Strength turns these calculations into your everyday training — automatic 1RM tracking, percentage-based programs, and a fast workout logger. Log the lift; we'll handle the math.