MELD 3.0 Calculator

Q: What is a normal MELD 3.0 score?

A normal or low-risk MELD 3.0 score is below 10 . This means the liver disease is mild. Patients with scores under 10 have a greater than 98% chance of surviving the next 90 days. A healthy person with normal lab values will typically score at or near 6 , which is the lowest possible score.

Q: Why is my creatinine value being changed by the calculator?

MELD 3.0 caps creatinine between 1.0 and 3.0 mg/dL . If you enter a value below 1.0, it is raised to 1.0. If you enter a value above 3.0, it is lowered to 3.0. If the patient is on dialysis, creatinine is automatically set to 3.0. These are the official OPTN capping rules.

Q: Can I use this calculator for a child under 12?

No. This calculator is only valid for patients aged 12 and older . For children under 12, you should use the PELD (Pediatric End-Stage Liver Disease) score instead. PELD uses a different formula designed for younger children.

Q: Why is my sodium value being capped?

MELD 3.0 caps sodium between 125 and 137 mEq/L . If the patient's sodium is below 125, the calculator uses 125. If it is above 137, the calculator uses 137. These caps are set by OPTN to keep the score within a validated range.

Q: Why does the score only go from 6 to 40?

OPTN clamps the final MELD 3.0 score to a range of 6 to 40 . Even if the raw math gives a number below 6 or above 40, the reported score stays within this range. A score of 6 means minimal liver disease. A score of 40 means the most critical level of disease.

MELD 3.0 Calculator

Updated Jun 29, 2026 By Jehan Wadia

Introduction

The MELD 3.0 Score Calculator helps doctors measure how sick a patient's liver is. MELD stands for Model for End-Stage Liver Disease. Hospitals and transplant centers use this score to decide how urgently a patient needs a liver transplant. A higher score means the liver disease is more serious.

MELD 3.0 is the newest version of the MELD scoring system, building on the earlier MELD calculator. It was adopted by OPTN (Organ Procurement and Transplantation Network) to make organ allocation fairer. Unlike older versions, MELD 3.0 adds serum albumin and a sex-based adjustment to the formula. These changes help reduce bias and give a more accurate picture of a patient's condition.

To use this calculator, you need five lab values: creatinine, bilirubin, INR, sodium, and albumin. You also need to know the patient's sex at birth and whether they have had recent dialysis. The tool applies the official capping rules, calculates the score step by step, and shows an estimated 90-day survival rate. This calculator is valid for patients aged 12 and older. For children under 12, use the PELD (Pediatric End-Stage Liver Disease) score instead.

How to Use Our MELD 3.0 Calculator

Enter your patient's age group, sex, dialysis status, and five lab values below. The calculator will return a MELD 3.0 score, estimated 90-day survival rate, 90-day mortality rate, and a full step-by-step breakdown of the math.

Age Eligibility: Select whether the patient is 12 years of age or older. You can use our age calculator if you need to confirm the patient's exact age. This calculator is only valid for patients aged 12 and up. If the patient is under 12, use the PELD calculator instead.

Adult or Adolescent: Select whether the patient is 18 or older. Both age groups use the same additive constant of +6.00 in the MELD 3.0 formula.

Sex at Birth: Choose male or female. Female sex adds 1.33 points to the score. This reflects differences in waitlist outcomes between sexes.

Dialysis Status: Select "Yes" if the patient had dialysis at least twice in the past week or had continuous venovenous hemodialysis (CVVHD) for 24 or more hours. If yes, creatinine is automatically set to 3.0 mg/dL.

Serum Creatinine (mg/dL): Enter the patient's creatinine level. Normal range is 0.7–1.3 mg/dL. The calculator caps this value between 1.0 and 3.0 mg/dL. For a more detailed assessment of renal function, consider using the creatinine clearance calculator or the GFR calculator.

Serum Bilirubin (mg/dL): Enter the patient's total bilirubin level. Normal range is 0.3–1.9 mg/dL. Values below 1.0 are raised to 1.0 for the calculation. There is no upper cap.

INR: Enter the patient's International Normalized Ratio. Normal range is 0.8–1.2. Values below 1.0 are raised to 1.0 for the calculation. There is no upper cap.

Serum Sodium (mEq/L): Enter the patient's sodium level. Normal range is 136–145 mEq/L. The calculator caps this value between 125 and 137 mEq/L. If you need to evaluate the patient's overall osmolar status, the serum osmolality calculator can provide additional clinical context.

Serum Albumin (g/dL): Enter the patient's albumin level. Normal range is 3.5–5.5 g/dL. The calculator caps this value between 1.5 and 3.5 g/dL. Albumin is unique to MELD 3.0 and is not used in older MELD versions.

Once all fields are filled in, click Calculate MELD 3.0 Score to see your results. Click Reset / Clear to start over with default values.

What Is the MELD 3.0 Score?

The MELD 3.0 score stands for Model for End-Stage Liver Disease, version 3.0. It is a number doctors use to measure how sick a person's liver is. The score ranges from 6 to 40. A higher score means the liver disease is more serious. Doctors use this score to decide how urgently a patient needs a liver transplant. Patients with higher scores are placed higher on the transplant waiting list.

How Is MELD 3.0 Different from Older Versions?

MELD 3.0 was introduced in 2022 and replaced the older MELD-Na formula. It added two new factors: serum albumin and sex assigned at birth. Studies showed that women with liver disease had worse outcomes than men at the same old MELD score. By adding sex and albumin, MELD 3.0 predicts 90-day survival more fairly and more accurately for all patients. Clinicians often use MELD 3.0 alongside the Child-Pugh calculator, which classifies cirrhosis severity based on a complementary set of clinical and laboratory criteria.

What Lab Values Does MELD 3.0 Use?

The MELD 3.0 formula uses five blood test results plus the patient's sex:

Serum creatinine – shows how well the kidneys are working. A GFR calculator can offer a more complete picture of kidney function when evaluating patients with liver disease.
Serum bilirubin – shows how well the liver clears waste from the blood. Elevated bilirubin alongside abnormal liver enzymes may also warrant evaluation with an AST/ALT ratio calculator.
INR (International Normalized Ratio) – shows how well the blood clots
Serum sodium – a low level can signal advanced liver disease
Serum albumin – a protein made by the liver; low levels mean the liver is struggling
Sex at birth – female patients receive an added 1.33 points

Each value has caps or floors. For example, creatinine is kept between 1.0 and 3.0 mg/dL, and sodium is kept between 125 and 137 mEq/L. If a patient has been on dialysis at least twice in the past week, creatinine is automatically set to 3.0 mg/dL.

Who Is This Calculator For?

This calculator is meant for patients aged 12 and older. Children under 12 should be scored using the PELD (Pediatric End-Stage Liver Disease) formula instead. Both adults (18+) and adolescents (12–17) use the same MELD 3.0 equation with an additive constant of 6.

What Do the Scores Mean?

A MELD 3.0 score gives an estimate of how likely a patient is to survive the next 90 days without a transplant. Scores below 10 are considered low risk, with over 98% survival. Scores of 40 mean the disease is critical, with roughly 71% or higher chance of death within three months. This score is one of the most important tools used by the United Network for Organ Sharing (UNOS) to allocate donor livers in the United States. Clinicians may also assess overall cardiovascular and metabolic risk alongside liver disease using tools such as the ASCVD risk calculator or the anion gap calculator to guide comprehensive patient management.

Important: This calculator is for informational and educational purposes only. It does not replace the judgment of a doctor. Always talk to a qualified hepatologist or transplant team about your results.

Formulas used

MELD 3.0 Raw Score

\text{MELD}_{\text{raw}} = 1.33 \times S + 4.56 \ln(B) + 0.82(137 - Na) - 0.24(137 - Na)\ln(B) + 9.09 \ln(I) + 11.14 \ln(Cr) + 1.85(3.5 - A) - 1.83(3.5 - A)\ln(Cr) + 6

MELD 3.0 Final Score (rounded and clamped)

\text{MELD 3.0} = \text{clamp}\!\left(\text{round}(\text{MELD}_{\text{raw}}),\; 6,\; 40\right)

Estimated 90-Day Mortality

M = \frac{100}{1 + e^{4.9908 - 0.14744 \times \text{MELD}}}

Estimated 90-Day Survival

S_{\text{surv}} = 100 - M

Frequently asked questions

What is a normal MELD 3.0 score?

A normal or low-risk MELD 3.0 score is below 10. This means the liver disease is mild. Patients with scores under 10 have a greater than 98% chance of surviving the next 90 days. A healthy person with normal lab values will typically score at or near 6, which is the lowest possible score.

Why does MELD 3.0 add points for being female?

Studies found that women on the liver transplant waitlist had worse outcomes than men with the same old MELD score. Women tended to be sicker than their scores showed. MELD 3.0 adds 1.33 points for female patients to correct this gap and make organ allocation fairer.

Why is my creatinine value being changed by the calculator?

MELD 3.0 caps creatinine between 1.0 and 3.0 mg/dL. If you enter a value below 1.0, it is raised to 1.0. If you enter a value above 3.0, it is lowered to 3.0. If the patient is on dialysis, creatinine is automatically set to 3.0. These are the official OPTN capping rules.

What does the 90-day survival estimate mean?

The 90-day survival estimate shows the chance that a patient will survive the next three months without a liver transplant. For example, a survival of 80% means there is roughly a 20% risk of death within 90 days if no transplant is done. This estimate is based on a logistic model fitted to published MELD 3.0 mortality data.

Why is albumin included in MELD 3.0?

Albumin is a protein made by the liver. When the liver is failing, albumin levels drop. Adding albumin to the formula gives a better picture of how well the liver is working. Older MELD versions did not include albumin, which made them less accurate at predicting outcomes.

Can I use this calculator for a child under 12?

No. This calculator is only valid for patients aged 12 and older. For children under 12, you should use the PELD (Pediatric End-Stage Liver Disease) score instead. PELD uses a different formula designed for younger children.

Why is my sodium value being capped?

MELD 3.0 caps sodium between 125 and 137 mEq/L. If the patient's sodium is below 125, the calculator uses 125. If it is above 137, the calculator uses 137. These caps are set by OPTN to keep the score within a validated range.

What counts as dialysis for this calculator?

The patient qualifies for the dialysis override if they had hemodialysis at least twice in the past seven days, or continuous venovenous hemodialysis (CVVHD) for 24 hours or more in the past week. If either is true, select "Yes" and creatinine will be set to 3.0 mg/dL automatically.

Why does the score only go from 6 to 40?

OPTN clamps the final MELD 3.0 score to a range of 6 to 40. Even if the raw math gives a number below 6 or above 40, the reported score stays within this range. A score of 6 means minimal liver disease. A score of 40 means the most critical level of disease.

Is the MELD 3.0 score the only factor used for transplant listing?

No. The MELD 3.0 score is one of the most important factors, but it is not the only one. Transplant teams also consider the patient's overall health, the cause of liver disease, tumor status, and other medical conditions. Some patients may also receive exception points for conditions not fully captured by lab values.

What is the difference between the adult and adolescent options?

Both adults (18 and older) and adolescents (12 to 17) use the same MELD 3.0 formula with the same additive constant of +6.00. The question is included for documentation and clinical context, but the math does not change between the two groups.

How often should the MELD 3.0 score be recalculated?

MELD scores are typically recalculated every time new lab work is done. For transplant waitlist patients, OPTN requires updated scores at regular intervals. Patients with higher scores are usually retested more often — sometimes every 7 days for very sick patients, and less often for those with lower scores.

Why are some of my lab values shown as adjusted in the results?

The MELD 3.0 formula has official floor and cap rules for certain values. If your entered number falls outside the allowed range, the calculator adjusts it. These adjusted values are marked with a ⚠ symbol in the "Values Used" table so you can see exactly what changed.

Can medications or recent procedures affect my MELD score?

Yes. Certain medications like warfarin can raise INR, which increases the MELD score. Recent blood transfusions, albumin infusions, or fluid resuscitation can also temporarily change lab values. Doctors should use lab results that reflect the patient's true baseline when possible.

What does the interaction term between sodium and bilirubin mean?

The MELD 3.0 formula includes a term that multiplies the sodium gap by the log of bilirubin: −0.24 × (137 − Na) × ln(Bilirubin). This interaction means the effect of low sodium on the score changes depending on how high bilirubin is. It helps the formula capture how these two values work together in advanced liver disease.