Tools
Strength calculators
These migrated React calculators are mounted as Astro islands so the page content stays fast while the interactive parts still work.
Calculator
1RM Calculator
Estimate your one-rep max from submaximal work using RIR.
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Calculator
Rep Max Calculator
Turn any hard set into an estimated X-RM for any rep range.
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Calculator
RPE Calculator
Generate estimated training loads across reps and intensities.
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Calculator
RPE Prescription Calculator
Get exact working weights for your target reps and RIR.
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Calculator
RIR Target Tool
See how hard a set should have felt based on load, reps, and 1RM.
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Calculator
RPE Load Calculator
Start from a desired RPE or RIR and reps, then calculate the bar load.
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