Progression's listing describes strength logging, named estimated-max formulas, weekly hard-set volume and exportable history. A visible formula matters because changing it can change the interpretation of progress.
ProgressionTwo estimated-max formulas can produce different numbers from the same set. Enter a weight and completed repetitions to compare Epley and Brzycki, inspect the arithmetic and keep a consistent reference when reviewing your training log.
Open this toolConsistent comparisons begin with consistent records. Save the exercise, load, repetitions and conditions before looking at the estimated maximum. Use the calculator to understand the estimate rather than to chase a test day.
Read this guideCompare how each app records your actual sets and lets you retrieve the history. Formula transparency and routine sharing solve different needs; neither replaces sound technique or individualized coaching.
Read the comparisonTwo estimated-max formulas can produce different numbers from the same set. Enter a weight and completed repetitions to compare Epley and Brzycki, inspect the arithmetic and keep a consistent reference when reviewing your training log.
Epley uses weight × (1 + reps/30); Brzycki uses weight × 36/(37 - reps). At one repetition, the completed weight is shown as the observed single. Compare sets performed under similar conditions.
Inputs are processed in this page. Nothing is submitted to the app or a business. Download a result to keep it; this page does not automatically save your work.
An estimated maximum is not a lifting prescription or a measured maximum. High-repetition sets, fatigue and technique reduce its usefulness. The web tool does not assess readiness, injury risk or an appropriate training load.
Progression's listing describes strength logging, named estimated-max formulas, weekly hard-set volume and exportable history. A visible formula matters because changing it can change the interpretation of progress.
View Progression on the App StoreThe current listing requires iOS 26.0 or later. Some features have additional device requirements. Check the listing and purchase screen for current availability and terms.
Recorded workout sets and load-volume summary
Keep load units consistent when summarizing workout volume
Separate planned sets from completed workout records
Compare recorded volume within an exercise, not across unrelated lifts
Progression vs Strong for recording and reviewing strength workouts