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A heavier load can be progression when repetitions, effort, technique, equipment, and range of motion remain comparable.
Free progressive overload calculator
Compare two sets without hiding the tradeoffs.
See how load, repetitions, set volume load, and reported RIR changed between two comparable sets. The result keeps every dimension visible instead of collapsing progress into one score.
No signup. Inputs stay in this browser.
Compare two sets
Use the same exercise, setup, range of motion, and unit.
This calculation runs locally and sends no data.
Load change
Rep change
Set volume change
Public arithmetic: set volume load = load × completed repetitions. Percentage change = (current − previous) ÷ previous × 100. RIR is compared separately because it is subjective effort context, not another unit of external work.
How to read the comparison
More repetitions
More repetitions at the same load can be progression. Randomized trials have found repetition progression and load progression both viable.
More set volume load
Load multiplied by reps summarizes one external-work dimension. It does not measure muscle tension, technique quality, fatigue, or hypertrophy.
Why there is no overall score
A heavier set with fewer repetitions, a higher-volume set taken closer to failure, or a set performed with changed technique cannot be resolved responsibly by one generic score. Review each change and ask whether the sessions were comparable. Forma’s in-app progression signal can organize more history, but its proprietary logic is not reproduced here.
Evidence
ACSM progression models, 2009
The position stand describes multiple progression variables and a contextual load-increase recommendation for resistance training.
Plotkin et al., 2022
An eight-week randomized study in 43 resistance-trained adults comparing load progression with repetition progression.
Chaves et al., 2024
A ten-week within-subject trial in 39 previously untrained young adults comparing the same two progression approaches.
Frequently asked questions
How does the progressive overload calculator work?
It compares the load, repetitions, load multiplied by repetitions, and reported RIR of two sets. It shows each change separately instead of producing one overall progress score.
Does a higher set volume prove progress?
No. Load multiplied by repetitions is simple external work arithmetic. Technique, range of motion, equipment, exercise order, rest, and proximity to failure can change what the comparison means.
Can adding repetitions count as progressive overload?
Yes. Trials in trained and previously untrained adults found that load progression and repetition progression were both viable during the studied training periods.
Does this tool use Forma’s proprietary progression model?
No. This calculator publishes direct arithmetic only. Forma keeps its proprietary equations, coefficients, thresholds, confidence logic, comparison windows, and recommendation rules private.
Keep the comparison connected to the full log.
Forma tracks sets, repetitions, load, optional RIR, estimated strength, weekly muscle volume, recovery context, nutrition, steps, and bodyweight trends.
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