What is the difference between MELD, MELD-Na, and MELD 3.0?

Original MELD uses bilirubin, creatinine, and INR. MELD-Na adds sodium, and MELD 3.0 adds albumin plus a sex adjustment to improve prediction.

Why is creatinine capped at 4.0?

Creatinine is capped so very high values do not overwhelm the rest of the score. Dialysis within the specified time window is also handled by setting creatinine to the capped value in the published framework.

What are MELD exception points?

Some transplant systems use exception processes when the laboratory MELD score does not fully capture disease burden. This calculator does not model those exception frameworks.

How often is MELD usually recalculated?

That depends on the care setting and the pace of clinical change. This page is best used as a score worksheet; timing of repeat testing varies by program and patient context.

Does MELD work for acute liver failure?

MELD was designed for chronic liver disease. Acute liver failure is usually assessed with different frameworks, so this page should not be treated as a stand-alone acute liver failure triage tool.

MELD Score Calculator

Calculate MELD, MELD-Na, and MELD 3.0 scores for liver disease severity and 3-month mortality-oriented reference context.

⚠️ Reference Note: MELD, MELD-Na, and MELD 3.0 are liver-disease severity scores. This page shows equation outputs and historic short-term mortality context only; it does not determine exception pathways or allocation outcomes.

Bilirubin

mg/dL

Creatinine

mg/dL

INR

Sodium

mEq/L

Albumin

g/dL

Dialysis (≥2x in past week)

▼

610203040

MELD-Na Score

Moderate severity band

Historic 3-month mortality context: 6%

MELD

MELD-Na

MELD 3.0

MELD Score (Original)

Bilirubin, creatinine, INR only

MELD-Na Score

Adds sodium to the original MELD framework

MELD 3.0

Adds albumin; this page does not adjust for sex

Historic 3-Month Mortality Context

Broad cohort context for MELD-Na 19

Severity Context

Moderate severity band

Moderate short-term severity context on this worksheet

Scope Note

Exceptions not modeled here

Exception pathways and allocation rules are outside this worksheet

MELD-Na	Category	Historic 3-Month Mortality	Reference Context
<10	Lower severity band	<2%	Lower short-term severity context
10-19	Moderate severity band	6%	Moderate short-term severity context
20-29	High severity band	20%	High short-term severity context
30-39	Very high severity band	53%	Very high short-term severity context
≥40	Extreme severity band	71%+	Extreme short-term severity context

Variable	Current Value	Bounded Value	Notes
Bilirubin	2.0 mg/dL	2.0	Minimum set to 1.0
Creatinine	1.5 mg/dL	1.5	Capped at 4.0; dialysis = 4.0
INR	1.5	1.5	Minimum set to 1.0
Sodium	137 mEq/L	137	Bounded 125-137 for MELD-Na
Albumin	3.0 g/dL	—	Used in MELD 3.0 (bounded 1.5-3.5)

Planning notes, formulas, and examples

About the MELD Score Calculator

The Model for End-Stage Liver Disease (MELD) score estimates short-term mortality in patients with liver disease. The original MELD model was built from laboratory values, and later versions added sodium and then albumin plus a sex adjustment to improve prediction.

This calculator shows the original MELD, MELD-Na, and MELD 3.0 together so you can compare how the scoring systems change the result for the same patient. The score range is bounded, and higher values indicate more severe liver disease on the MELD scale.

That makes it useful for quick severity checks and for understanding how sodium or albumin shifts the final score.

When This Page Helps

MELD is useful because it turns a small set of routine labs into a severity estimate that is easy to compare over time. Seeing the older and newer versions side by side also makes it easier to understand how sodium and albumin change the score.

The page is best treated as a reference worksheet. It does not model listing status, exception points, or allocation outcomes.

How to Use the Inputs

Enter total bilirubin, creatinine, and INR from recent labs.
Enter sodium and albumin for MELD-Na and MELD 3.0 calculations.
Indicate if the patient has been on dialysis at least 2 times in the past week.
Review all three MELD versions and the historic mortality-oriented context.
Note that values are automatically bounded per the published scoring rules.
Use the results as reference context alongside the broader liver-disease picture rather than as a stand-alone decision rule.

Formula used

MELD = 10 × [0.957 × ln(Cr) + 0.378 × ln(Bil) + 1.120 × ln(INR) + 0.643]

MELD-Na = MELD − Na − 0.025 × MELD × (140 − Na) + 140
Sodium bounded 125-137

MELD 3.0 = 1.33(female) + 4.56×ln(Bil) + 0.82×(137−Na) − 0.24×(137−Na)×ln(Bil) + 9.09×ln(INR) + 11.14×ln(Cr) + 1.85×(3.5−Alb) − 1.83×(3.5−Alb)×ln(Cr) + 6

All scores bounded 6-40. Cr capped at 4.0; if dialysis ≥2x/week, Cr = 4.0.

Example Calculation

Result: MELD 15, MELD-Na 15

With bilirubin 2.0, creatinine 1.5, INR 1.5, and sodium 137, the original MELD and MELD-Na both round to 15. That places the case in a moderate short-term severity band with an estimated 3-month mortality around 6% on commonly cited MELD tables.

Tips & Best Practices

Use bilirubin, creatinine, INR, sodium, and albumin from the same general time window when possible.
Pay attention to the bounded inputs so you know why the displayed score may differ from a raw mental estimate.
Compare MELD, MELD-Na, and MELD 3.0 together rather than relying on one version in isolation.
Treat the mortality figures as historic cohort context rather than as a patient-specific forecast.

Comparing MELD Versions

Original MELD uses bilirubin, creatinine, and INR. MELD-Na adds sodium, which can materially change the score in hyponatremic patients. MELD 3.0 adds albumin and a sex adjustment to improve short-term mortality prediction.

Why the Inputs Are Bounded

The published MELD frameworks cap or floor some values so extremely low or high laboratory numbers do not distort the score. That is why this calculator bounds creatinine, bilirubin, INR, and sodium before calculating the final result.

Using the Score Responsibly

MELD is best treated as a severity worksheet and mortality-oriented reference. It does not capture every aspect of liver disease, and it should not be used as a stand-alone transplant, treatment, or triage engine.

Sources & Methodology

Last updated: March 26, 2026

Methodology

This calculator reports three liver-disease severity models side by side. The classic MELD calculation uses bilirubin, INR, and creatinine with the usual bounded laboratory inputs and dialysis cap. MELD-Na adds the sodium adjustment used in transplant prioritization, and the MELD 3.0 output adds albumin and a sex adjustment consistent with the updated model used in the modern allocation era.

The page is designed for severity framing and transplant-priority discussions, not as a substitute for official OPTN calculation, exception-point review, or transplant-center decision-making. Exception diagnoses and listing rules can materially change real-world transplant priority beyond the laboratory formula alone.

Sources

Learn about MELD (OPTN / HRSA) — Official MELD calculator guide describing current allocation inputs and model use.
MELD 3.0: The Model for End-Stage Liver Disease Updated for the Modern Era (PubMed / Gastroenterology)

Frequently Asked Questions

Original MELD uses bilirubin, creatinine, and INR. MELD-Na adds sodium, and MELD 3.0 adds albumin plus a sex adjustment to improve prediction.