MELD Score Calculator
Model for End-Stage Liver Disease
Calculate MELD and MELD-Na scores to assess the severity of chronic liver disease and predict short-term mortality risk.
Enter Lab Values
Normal range: 0.6-1.2 mg/dL (53-106 μmol/L)
Normal range: 0.1-1.2 mg/dL (2-21 μmol/L)
Normal range: 0.8-1.2
Normal range: 135-145 mEq/L
Important Note
This calculator is for educational purposes only. MELD scores should be interpreted by qualified healthcare professionals.
About MELD Score
The MELD (Model for End-Stage Liver Disease) score is a numerical scale used to assess the severity of chronic liver disease and predict short-term mortality risk.
It is primarily used to prioritize patients for liver transplantation. Higher scores indicate more severe disease and greater urgency for transplant.
Score Ranges:
- ●<10: Mild disease, low mortality risk
- ●10-19: Moderate disease, moderate risk
- ●20-29: Severe disease, high risk
- ●30-40: Very severe disease, very high risk
MELD-Na Score
MELD-Na is an enhanced version of the MELD score that includes serum sodium levels. It provides better prediction of mortality in patients with cirrhosis.
Low sodium levels (hyponatremia) are associated with increased mortality in liver disease patients. MELD-Na accounts for this additional risk factor.
Clinical Use:
- Liver transplant allocation
- Prognosis assessment
- Treatment decision making
- Clinical trial stratification
MELD Score Formula
MELD Score:
MELD = 3.78×ln(bilirubin) + 11.2×ln(INR) + 9.57×ln(creatinine) + 6.43
MELD-Na Score:
MELD-Na = MELD + 1.32×(137-Na) - [0.033×MELD×(137-Na)]
Note: Minimum values are applied (creatinine ≥1.0, bilirubin ≥1.0, INR ≥1.0). Sodium is capped between 125-137 mEq/L. Final score is rounded and capped at 40.
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