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Nurse To Patient Ratio Calculator

Work out nurse to patient ratio instantly with clear inputs, formula shown and shareable results.

About Nurse To Patient Ratio Calculator

Divides patients by nurses for the staffing ratio and converts the rostered hours into nursing hours per patient, the measure used in workforce planning.

Formula

Staffing ratio

Patients per nurse = patients / nurses; nursing hours per patient = nurses x shift hours / patients

Worked example

With the default values below, Nurse To Patient Ratio Calculator returns Patients per nurse of 4.50. Change any input above and every figure here is recalculated in your browser.

Inputs used

Nurses on shiftaccepts 1–60
6
Patients on the unitaccepts 1–200
27
Shift lengthaccepts 4–24 h
12 h

Results

Patients per nurse
4.50
Nursing hours per patient for this shift
2.67 h
Ratio
1 nurse to 4.5 patients
Nursing minutes per patient per hour
13.3 min

Step by step

  1. 1Values used
  2. 2Staffing ratio
  3. 3Patients per nurse= 4.50
  4. 4Nursing hours per patient for this shift= 2.67 h
  5. 5Ratio= 1 nurse to 4.5 patients
  6. 6Nursing minutes per patient per hour= 13.3 min

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, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 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.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

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

What ratios are mandated?

California sets 1:5 on medical-surgical wards and 1:2 in intensive care; most systems use guidance rather than law.

Why measure hours per patient day?

It captures skill mix and shift length, which a headcount ratio alone misses.

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