MELD Score Calculator

MELD Score Calculator for Gastroenterology. The number is neither a contemporary allocation score nor a personal mortality forecast. Current US allocation uses MELD 3.0 and additional policy rules.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

Classic MELD uses 3.78 ln(bilirubin mg/dL) + 11.2 ln(INR) + 9.57 ln(creatinine mg/dL) + 6.43, rounded and limited to 6-40. Laboratory values below 1 are floored at 1; creatinine is capped at 4. The historical dialysis rule sets creatinine to 4 after at least two sessions or 24 hours CVVHD in the previous seven days.

When to use this calculator

Historical liver-model study and comparison only. This form now provides classic MELD; the separate MELD-Na tool supplies the sodium-adjusted version.

Inputs used

  • Total bilirubin (umol/L; US mg/dL)
  • INR
  • Serum creatinine (umol/L; US mg/dL)
  • At least 2 dialysis sessions, or at least 24 hours of continuous venovenous hemodialysis, in the preceding 7 days

Clinical interpretation

The number is neither a contemporary allocation score nor a personal mortality forecast. Current US allocation uses MELD 3.0 and additional policy rules.

Worked example

Bilirubin 4 mg/dL, INR 1.8 and creatinine 1.5 mg/dL without dialysis yield 22. Values of 0.8 for each laboratory input are all floored to 1, yielding 6.

Limitations and safety notes

Historical formula and dialysis handling do not reproduce current allocation policy, exceptions, eligibility or listing decisions. Laboratory timing and assay validity still require clinical verification.

Frequently asked questions

Why is there no mortality percentage?

A historical score-to-outcome table is not a calibrated personal forecast and cannot safely be reused for a different MELD version.

What does this result leave unresolved?

Historical formula and dialysis handling do not reproduce current allocation policy, exceptions, eligibility or listing decisions. Laboratory timing and assay validity still require clinical verification.

References

  • https://www.hrsa.gov/sites/default/files/hrsa/optn/policy-guid-change_impr-liv-alloc-meld-peld-sta-1a-sta-1b_liv.pdf

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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