Formula
Nurses per shift = ceiling(patients / patients per nurse). Nurses per day = nurses per shift x shifts per day.
Nurse Staffing Ratio Calculator
Estimate nurses required per shift and per day from patient count, staffing ratio and daily shift count.
Worked example
For 20 patients at a 1:4 ratio, the calculator returns 5 nurses per shift and 15 nurses across three shifts.
Professional note
Professional note: print the input values, formula, result and date together so the calculation can be reviewed later.
Regional and unit assumptions
Basis: transparent planning arithmetic using the visible inputs and assumptions on this page.
Assumptions and limitations
- Planning arithmetic only. Actual staffing depends on acuity, law, enterprise agreements, skill mix, breaks, float staff and facility policy.
Methodology & Accuracy
How this calculator is checked
CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.
Formula used
Nurses per shift = ceiling(patients / patients per nurse). Nurses per day = nurses per shift x shifts per day.
Standard or basis
Basis: transparent planning arithmetic using the visible inputs and assumptions on this page.
Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.Master's Tip
Professional note: print the input values, formula, result and date together so the calculation can be reviewed later.
Related calculators
Questions
What is the Nurse Staffing Ratio Calculator?
The nurse staffing calculator divides patient count by the nurse-to-patient ratio and rounds up to a whole nurse per shift.
Can I rely on this as professional advice?
No. Use it as a transparent planning estimate, then verify the current rule, rate, contract or official source for the decision you are making.