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Ranson Criteria Calculator

Work out ranson criteria instantly with clear inputs, formula shown and shareable results.

About Ranson Criteria Calculator

Adds the five admission and six 48-hour Ranson criteria for acute pancreatitis; three or more predicts a severe course.

Formula

Ranson criteria

Score = admission criteria (0-5) + 48-hour criteria (0-6); 3 or more predicts severe acute pancreatitis

Worked example

With the default values below, Ranson Criteria Calculator returns Ranson score of 4. Change any input above and every figure here is recalculated in your browser.

Inputs used

Criteria met on admissionaccepts 0–5
2
Criteria met at 48 hoursaccepts 0–6
2

Results

Ranson score
4
Predicted severity
Three or more criteria — predicted severe pancreatitis
Reported mortality band
10%
Maximum possible score
11

Step by step

  1. 1Values used
  2. 2Ranson criteria
  3. 3Ranson score= 4
  4. 4Predicted severity= Three or more criteria — predicted severe pancreatitis
  5. 5Reported mortality band= 10
  6. 6Maximum possible score= 11

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 whole numbers, 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

Why does scoring take 48 hours?

Six of the eleven criteria are 48-hour changes, which limits Ranson's usefulness for immediate triage.

What alternatives exist?

BISAP and the modified Glasgow score can be applied earlier, and APACHE II is used in critical care.

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