calculate meld

What is the MELD score?

MELD stands for Model for End-Stage Liver Disease. It is a numerical score used to estimate the short-term severity of chronic liver disease. Clinicians use this score to help prioritize liver transplant candidates and to guide conversations around risk and urgency.

In practical terms, a higher score generally indicates more severe liver dysfunction and a higher short-term risk of mortality. MELD is not a diagnosis by itself; it is one piece of a larger clinical picture that includes symptoms, imaging, coexisting conditions, and physician judgment.

Inputs used in MELD and MELD-Na

Core MELD variables

• Total bilirubin: reflects the liver's ability to clear bile pigments.
• INR: reflects blood clotting and synthetic function of the liver.
• Creatinine: captures kidney function, which strongly influences outcomes in advanced liver disease.

MELD-Na addition

MELD-Na includes serum sodium because low sodium in advanced cirrhosis is associated with worse outcomes. Adding sodium can improve risk stratification in many patients.

How this calculator works

This page calculates a traditional MELD estimate with commonly used bounds:

• Any bilirubin, INR, or creatinine value below 1 is set to 1 for the logarithmic formula.
• Creatinine is capped at 4.0.
• If dialysis is selected, creatinine is set to 4.0.
• Final MELD values are clamped to a typical range of 6 to 40.

If sodium is entered, MELD-Na is also calculated using the standard adjustment with sodium bounded from 125 to 137 mEq/L.

Interpreting your score

Interpretation varies by institution and patient context, but this rough framework is often used:

• 6–9: lower short-term risk
• 10–19: moderate risk; close follow-up often needed
• 20–29: high risk; transplant evaluation often urgent
• 30–39: very high risk
• 40: extremely high risk (top end of score range)

Important: these categories are educational summaries. Clinical decisions should never rely on a single number in isolation.

Why MELD matters in transplant medicine

Organ allocation systems aim to prioritize patients based on medical urgency and expected benefit. Because MELD is objective and lab-based, it can reduce subjectivity in waitlist ranking. The score is recalculated over time as labs change, so transplant priority can change as a patient's condition evolves.

Still, transplant listing and allocation involve many factors beyond MELD, including contraindications, complications, center-specific policies, and broader ethical frameworks.

Limitations and important caveats

MELD is not perfect

• It may under-represent severity in some conditions (for example, certain complications without dramatic lab changes).
• Lab timing and variability can affect score precision.
• Scores should be interpreted alongside examination findings and imaging.

Always use clinician guidance

If you are a patient or caregiver, use tools like this to improve understanding, not to self-manage severe illness. If you notice worsening symptoms—confusion, bleeding, abdominal swelling, jaundice, or decreased urine output—seek immediate medical care.

Frequently asked questions

Is MELD the same as MELD-Na?

Not exactly. MELD-Na starts with MELD and adjusts the estimate using sodium, often improving prognostic accuracy.

Can I use old lab values?

You can, but recent values are more clinically meaningful. MELD can shift quickly in unstable patients.

Does a high MELD guarantee transplant?

No. A high score indicates urgency, but transplant eligibility and organ availability involve many additional criteria.

Bottom line

The MELD system is one of the most widely used tools in modern hepatology for objective risk assessment. This calculator gives a fast estimate, helps you understand the variables, and supports informed discussions with your care team.