Ranson Criteria Calculator (Pancreatitis)

Calculate Ranson criteria score to assess the severity and mortality risk of acute pancreatitis.

Age >55 years (at admission)

WBC >16,000/mm³ (at admission)

Glucose >200 mg/dL (at admission)

LDH >350 IU/L (at admission)

AST >250 IU/L (at admission)

Hematocrit drop >10% (at 48 hours)

BUN rise >5 mg/dL (at 48 hours)

Calcium <8 mg/dL (at 48 hours)

PaO₂ <60 mmHg (at 48 hours)

Base deficit >4 mEq/L (at 48 hours)

Fluid sequestration >6 L (at 48 hours)

How to Use the Ranson Criteria Calculator

Select 'Yes' for each criterion present at admission (first 5).
At 48 hours, select 'Yes' for each criterion that has developed (last 6).
Click 'Calculate' to see the score and estimated mortality.

Use Cases

•Assessing acute pancreatitis severity at admission and 48 hours.
•Identifying patients requiring ICU-level care.
•Estimating mortality risk in pancreatitis.

Formula

Ranson = 5 admission criteria + 6 criteria at 48 hours. Score 0–11. Higher score = higher mortality.

Frequently Asked Questions

What are Ranson criteria?

Ranson criteria are 11 clinical and laboratory markers used to predict the severity and mortality of acute pancreatitis. Five criteria are assessed at admission and six at 48 hours.

How are Ranson criteria interpreted?

Score 0–2: <1% mortality. Score 3–4: ~15%. Score 5–6: ~40%. Score 7–11: ~100%. Scores ≥3 indicate severe pancreatitis.

Medical disclaimer

This calculator is for educational purposes only. It does not replace professional medical evaluation. Always consult a qualified healthcare provider for clinical decisions.