Readmission Rate Calculator

Work out readmission rate instantly with clear inputs, formula shown and shareable results.

About Readmission Rate Calculator

Divides readmissions by eligible discharges and compares the rate with a benchmark to show excess readmissions.

Formula

Readmission rate

Rate (%) = readmissions in the window / eligible discharges x 100; excess = observed readmissions - benchmark rate x discharges

Worked example

With the default values below, Readmission Rate Calculator returns Readmission rate of 5.00%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Readmissions within the windowaccepts 0–10,000: 25
Eligible dischargesaccepts 1–100,000: 500
Benchmark rateaccepts 0–60: 12

Results

Readmission rate: 5.00%
Ratio to the benchmark: 0.417
Readmissions above the benchmark: -35.0
Readmissions per 1000 discharges: 50.0

Step by step

1Values used
2Readmission rate
3Readmission rate= 5.00
4Ratio to the benchmark= 0.417
5Readmissions above the benchmark= -35.0
6Readmissions per 1000 discharges= 50.0

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Which window is standard?

30 days from discharge is the most widely reported, though 7 and 90 day windows are also used.

Are planned readmissions counted?

No. Planned procedures and some transfers are normally excluded from the numerator.