MELD Score Calculator

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Medical disclaimer: This calculator is for informational purposes only and is not medical advice. Always consult a qualified healthcare professional for medical decisions.

Serum bilirubin (mg/dL)

Values below 1.0 are set to 1.0 per MELD rules.

Serum creatinine (mg/dL)

Values above 4.0 are capped at 4.0 per MELD rules.

INR (International Normalized Ratio)

Patient received dialysis twice in the past 7 days

If checked, creatinine is automatically set to 4.0.

MELD score

Enter the lab values above and the MELD score appears here.

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What is the MELD Score Calculator?

The MELD Score Calculator is a free online medical tool that computes the Model for End-Stage Liver Disease (MELD) score, the standard measure of liver disease severity used worldwide. The MELD score predicts three-month survival in patients with advanced liver disease and is the primary system used to prioritize candidates on the liver transplant waiting list. A higher score means more urgent need: scores range from 6 (less ill) to 40 (gravely ill).

The score is calculated from three objective laboratory values: serum bilirubin, INR (a blood clotting measure), and serum creatinine (a kidney function marker). The formula is 3.78 times the natural log of bilirubin, plus 11.2 times the natural log of INR, plus 9.57 times the natural log of creatinine, plus 6.43. Because it uses only lab results, MELD is objective and reproducible, which is why transplant centers trust it over subjective assessments.

How to Use the MELD Score Calculator

Gather your lab results: Find your most recent serum bilirubin (mg/dL), INR, and serum creatinine (mg/dL) values from your blood test report.
Enter bilirubin: Type your total bilirubin value. Values below 1.0 are automatically treated as 1.0 in the official formula.
Enter INR: Type your International Normalized Ratio, which reflects how quickly your blood clots.
Enter creatinine: Type your serum creatinine value. The formula caps it at 4.0 mg/dL, or higher if you have had dialysis twice in the past week.
Read your score: Your MELD score appears instantly on the 6 to 40 scale, along with the estimated three-month mortality range for context.

Key Benefits

Official formula: Uses the exact UNOS-adopted MELD equation, not an approximation.
Instant results: No manual logarithm math, the score appears the moment you finish typing.
Transplant context: See how your score relates to waiting-list priority bands.
Track over time: Recalculate after each new lab panel to watch your trend.
Free with no signup: Unlimited calculations, and your health data never leaves your browser.

Pro Tips

Use the same lab: Different laboratories can report slightly different values, so compare scores from the same lab for the most meaningful trend.
Know the MELD-Na variant: Many centers now use MELD-Na, which adds serum sodium. Ask your doctor which version your center uses.
Scores change with labs: A single MELD score is a snapshot. The direction of change across months matters as much as the number itself.
Bring printouts to appointments: A dated list of your scores helps your hepatologist see the full picture quickly.

Frequently Asked Questions

What is a normal MELD score?

Healthy people score around 6 to 8. Scores of 10 or above indicate significant liver disease, and scores above 30 signal a very high short-term risk.

How is the MELD score used for transplants?

Transplant centers rank waiting-list candidates by MELD score, so the sickest patients, those with the highest scores, receive donor livers first.

Can my MELD score go down?

Yes. If your lab values improve with treatment, your score decreases. That is why doctors recalculate it regularly.

Does a high MELD score guarantee a transplant?

No. The score determines priority, but organ availability, blood type, body size and other medical factors also decide who receives a liver.

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Medical Disclaimer: This calculator is for informational and educational purposes only and is not medical advice. The MELD score must be interpreted by a qualified healthcare professional in the context of your full medical history. Always consult your doctor or hepatologist before making any health decisions.

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