MELD Score Calculator

Calculate the Model for End-Stage Liver Disease (MELD) score, used to assess liver disease severity and prioritize liver transplant allocation. Educational reference tool only.

🫁 Clinical Reference📐 MELD = formula combining bilirubin, INR, creatinine🏥 Health
Bilirubin (mg/dL)
INR
Creatinine (mg/dL)
Please enter valid values.

Formula & Reference

VariableSymbolFormulaUnits
MELD Score Calculator—MELD = formula combining bilirubin, INR, creatininescore 6-40

Step-by-Step Examples

Example 1
Mild Disease

Bilirubin=1.5, INR=1.2, Creatinine=0.9.

  • Using floor values: Creat=1.0 (floored), Bili=1.5, INR=1.2
  • MELD = 9.57×ln(1.0)+3.78×ln(1.5)+11.2×ln(1.2)+6.43
  • = 0+1.53+2.05+6.43 = 10.01 ≈ 10
✓ MELD ≈ 10 (lower severity)
Example 2
Moderate Disease

Bilirubin=3.5, INR=1.8, Creatinine=1.5.

  • MELD = 9.57×ln(1.5)+3.78×ln(3.5)+11.2×ln(1.8)+6.43
  • = 3.88+4.74+6.59+6.43 = 21.64 ≈ 22
✓ MELD ≈ 22 (moderate severity)
Example 3
Severe Disease

Bilirubin=8.0, INR=2.5, Creatinine=2.8.

  • MELD = 9.57×ln(2.8)+3.78×ln(8.0)+11.2×ln(2.5)+6.43
  • = 9.85+7.86+10.27+6.43 = 34.41 ≈ 34
✓ MELD ≈ 34 (high severity)

Real-World Applications

🫁
Liver Transplant Allocation
MELD score is the primary tool used in the US for prioritizing patients on liver transplant waiting lists.
🏥
Hepatology Practice
Liver disease specialists track MELD scores to monitor disease progression and treatment effectiveness.
📚
Medical Education
MELD calculation is a standard teaching topic in gastroenterology and transplant medicine training.
📊
Clinical Research
MELD scores are commonly used as outcome predictors and stratification variables in liver disease research studies.

Common Mistakes to Avoid

⚠️
Using this for actual transplant decisions

MELD-based transplant allocation involves complex additional factors and exception criteria beyond the basic calculation — always requires specialist hepatology and transplant team evaluation.

⚠️
Forgetting the value floors and ceiling in the formula

The MELD formula applies specific floor values (minimum 1.0 for bilirubin/INR, minimum 1.0 and maximum 4.0 for creatinine) that significantly affect calculations in extreme cases.

⚠️
Not accounting for MELD-Na or other updated versions

Several updated versions exist (MELD-Na incorporates sodium, MELD 3.0 includes additional factors) — the basic original formula shown here is simplified for educational purposes.

Frequently Asked Questions

What is MELD score used for? ▾
Originally developed to predict survival after a liver shunt procedure, it's now primarily used to prioritize liver transplant candidates based on disease severity and urgency.
What do MELD score ranges mean? ▾
Generally: <15 lower priority/severity, 15-24 moderate, 25+ higher severity with increased mortality risk and transplant priority, though specific clinical interpretation requires specialist context.
What is MELD-Na? ▾
An updated version incorporating serum sodium level, since hyponatremia has been shown to be an independent predictor of mortality in liver disease, improving prediction accuracy.
How often is MELD score recalculated? ▾
Frequency varies by clinical status — stable outpatients might be reassessed periodically, while hospitalized or critically ill patients may have scores recalculated more frequently to guide care decisions.
Is this calculator suitable for clinical decision-making? ▾
No — this is an educational reference tool only. Actual transplant allocation and clinical management decisions require comprehensive evaluation by qualified hepatology and transplant specialists.

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