MELD Score Calculator
Classic MELD and sodium-adjusted MELD-Na from labs — educational only. Click any i for detail.
Labs
Creatinine (mg/dL)
i
Cr
Capped 1.0–4.0; dialysis sets creatinine to 4.0. |
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|---|---|
Bilirubin (mg/dL)
i
Bili
Minimum 1.0 for the formula. |
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INR
i
INR
Minimum 1.0 for the formula. |
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Sodium (mEq/L)
i
Na
Clamped 125–137 for MELD-Na. |
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Dialysis (≥2× in last week)?
i
Dialysis
Sets creatinine to 4.0. |
How to use this calculator
- Enter creatinine, bilirubin, INR, and sodium.
- Mark dialysis if applicable.
- Read MELD and MELD-Na.
- Interpret only with a clinician — listing priority is not this page’s job.
Results explained
MELD combines creatinine, bilirubin, and INR with published coefficients and rounding. MELD-Na further adjusts for hyponatremia when MELD is above 11. Lab units, dialysis rules, and transplant policy evolve — this is arithmetic practice, not allocation advice.
Quick reference: MELD
MELD = round(10×(0.957 ln Cr + 0.378 ln bili + 1.120 ln INR + 0.643)).
| Item | Detail |
|---|---|
| Cr / bili / INR floors | ≥1.0 (Cr also ≤4) |
| Dialysis | Cr = 4.0 |
| MELD-Na | Uses Na clamped 125–137 when MELD>11 |
| Rounding | Nearest integer |
Educational worksheet only — not a transplant listing tool.
How the estimate is built
Clamp labs; MELD as published; if MELD>11, MELD-Na = MELD + 1.32(137−Na) − 0.033×MELD×(137−Na).
Example scenario
Cr 1.2, bili 2.0, INR 1.5, Na 135 → MELD about 15, MELD-Na about 17.
FAQ
SI units?
This page expects mg/dL creatinine/bilirubin and mEq/L sodium.
Why floors at 1.0?
The original formula clamps low values to avoid extreme logs.
Is MELD-Na always used?
Policies vary; both scores are shown for learning.
Can I use this for prognosis alone?
No — clinicians use full context.