Check data

Check a change in rates

Enter counts and totals for two periods; separate count change, percentage points and relative change.

Calculate with your own counts

For a part-to-whole rate. Enter both numerators and denominators to retain counts, percentage points, and relative change. The calculator does not verify population comparability.

Counts for each periodEarlier completed countEarlier eligible totalLater completed countLater eligible total

Add definitions, periods, and comparability notes (optional)

Measure and action definitionEarlier observation periodLater observation periodDefinition and comparability notes

Results appear when all counts are valid. Missing values, a zero denominator, or a numerator exceeding its total produce no conclusion.

Inputs stay on this page and are not retained after reload. Display uses at most two decimals; changes below rounding precision retain their sign. A before/after change does not establish causality.

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