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Infection Rate Per 1000 Days Calculator

Work out infection rate per 1000 days instantly with clear inputs, formula shown and shareable results.

About Infection Rate Per 1000 Days Calculator

Divides infections by device or patient days and multiplies by 1000, the standard device-associated infection rate used in surveillance reporting.

Formula

Device-associated rate

Rate per 1000 device days = infections / device days x 1000

Worked example

With the default values below, Infection Rate Per 1000 Days Calculator returns Rate of 4.706. Change any input above and every figure here is recalculated in your browser.

Inputs used

Infections identifiedaccepts 0–1,000
4
Device days or patient daysaccepts 1–1,000,000
850

Results

Rate
4.706 per 1000 days
Rate
0.471 per 100 days
Device days per infection
212.5
Denominator used
850 days

Step by step

  1. 1Values used
  2. 2Device-associated rate
  3. 3Rate= 4.706 per 1000 days
  4. 4Rate= 0.471 per 100 days
  5. 5Device days per infection= 212.5
  6. 6Denominator used= 850 days

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges 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

Why use device days rather than admissions?

It adjusts for exposure time, so units with longer device use are compared fairly.

What counts as a device day?

Each calendar day on which a patient has the device in place, counted once per patient per day.

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