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Rackory app icon: a barbell loaded with pale green plates on a dark green tile

iPhone app · by Campflame

Rackory: 1RM Calculator

Less math. More lifting.

From your starting max to the plates on your bar. Prepare a load, edit your warm-ups and know exactly what changes next.

  • iPhone
  • Coming soon to the App Store

See Rackory in action Get support

Your next session, from start to finish

A clear plan for the bar.

01 / Free calculator

Estimate your max

Start from a completed set, or use a dated known or training max. Keep the starting point clear.

Rackory shows a 100 kg set of five reps and an estimated one-rep max of 115.1 kg.

02 / Free calculator

Prepare every set

See warm-ups your own bar and plate inventory can make, with the load shown on each side.

Rackory shows a 52.5 kg warm-up and 15 kg plus 1.25 kg plates on each side.

03 / Optional Pro

Pick up where you left off

With optional Pro, save the working load, equipment and warm-ups as a setup to use again.

Rackory Library shows a saved squat setup with a 90 kg working load, dated estimated max and three warm-ups.

Actual app screens with sample lifting data. Saving new setups requires optional Pro. Tap a screen to see it in full.

What it does

  • Estimate your one-rep max Enter a completed set and see Epley, Brzycki, Lombardi, O’Conner and Wathen side by side, with their average as the headline. Or use a known or training max.
  • Working weights at a glance Percentages from 50% to 100% in 5% steps. Tap one to open the plate loader.
  • Your bar, your plates Set your bar weight, collars and the plates you actually own. Find an exact symmetric load, or the nearest weights below and above your target.
  • Warm-ups and plate changes Edit your warm-up steps, confirm what is on the bar, then follow ordered removals and additions on each side for the next set.
  • Kilograms or pounds Switch units while the physical weight of your equipment stays consistent. No account required.
  • Keep your next session ready Optional one-time Pro adds saved setups, lift records, extra equipment inventories, share cards and a working-weight widget. Your existing saved data remains accessible if Pro is unavailable.

Estimates are a guide. Formula results vary by exercise and person, especially above ten reps.