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MELD / MELD-Na Calculator

Model for End-Stage Liver Disease (MELD) and MELD-Na scores for chronic liver disease severity and transplant prioritization contexts.

Inputs

Total bilirubin (mg/dL)

INR

Creatinine (mg/dL) Capped at 4.0 mg/dL; minimum 1.0 mg/dL in MELD formula.

Sodium (mmol/L) For MELD-Na: Na is clamped to 125–137.

Dialysis (at least twice in past 7 days) (set creatinine to 4.0)

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Enter labs to calculate MELD and MELD-Na.

MELD—

MELD-Na—

Approx. 90-day mortality—

Notes—

Disclaimer: For educational purposes only. Not a substitute for clinical judgment. Transplant allocation rules vary; use the score definitions required by your program and jurisdiction.

Formulas used

MELD: 3.78·ln(bilirubin) + 11.2·ln(INR) + 9.57·ln(creatinine) + 6.43 (labs minimum 1.0; creatinine max 4.0; dialysis → creatinine=4.0)
MELD-Na (UNOS): MELD + 1.32·(137−Na) − 0.033·MELD·(137−Na), with Na clamped 125–137

Mortality estimates

Approximate 90-day mortality is often cited by MELD ranges (not MELD-Na). Estimates vary by cohort and era.

References

Kamath PS, et al. A model to predict survival in patients with end-stage liver disease. Hepatology. 2001.
Biggins SW, et al. Serum sodium predicts mortality in patients listed for liver transplantation. Hepatology. 2006.
UNOS/OPTN MELD-Na policy documentation (formula definition).