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ADULT LABORATORY TOOL · DIETXP INTELLIGENCE · OPTN MELD 3.0

MELD Score
Calculator.

Compare adult laboratory MELD 3.0 with the historical MELD and MELD-Na models. See the formula adjustments, source record and a separate nutrition assessment guide.

MELD 3.0 · OPTN July 2023
OPTN Formula Rules
Nutrition Assessment Guide
Sources checked · 12 October 2026

Enter Lab Values

Fields marked required · Optional fields unlock MELD-Na & MELD 3.0

Calculator fields are processed in your browser and are not saved by this calculator. Downloaded reports contain the values you enter.
Confirm age 18 or older when registered; use current age if not listed. Use the official age-specific calculator for other ages.
Floored at 1.0 · Capped at 4.0 (MELD) / 3.0 (MELD 3.0)
Total bilirubin · Floored at 1.0
International Normalised Ratio · Floored at 1.0
Serum sodium · Enables MELD-Na & MELD 3.0 · Clamped 125–137
Required for MELD 3.0 · Limited to 1.5–3.5 g/dL in the formula
Select with the treating team under OPTN guidance. A blank selection does not assume male.

Nutrition targets require a separate assessment; body weight and ascites do not enter these MELD equations.

DietXP Intelligence · Adult MELD 3.0 · Historical MELD / MELD-Na · Source check 12 October 2026

PRIMARY AVAILABLE LABORATORY SCORE
—
Awaiting calculation
Awaiting input

— MELD
— MELD-Na
— MELD 3.0

WHAT THIS CALCULATES

All 3 MELD VersionsOriginal · MELD-Na · MELD 3.0
Laboratory Score RangeModel and population limits explained
Nutrition AssessmentSeparate assessment of intake and muscle loss
Transparent InputsEntered values and applied limits
Local Clinical ReviewConfirm centre policy with the transplant team
PDF Clinical ReportShare with patient or team

SPECIALIST CARE

Clinical Dietitian
Liver MNT Consultation

Our hepatology-trained dietitian will build a personalised nutrition plan integrating your MELD score, comorbidities, and transplant status.

Book Consultation →

GUIDELINES USED

OPTN July 2023MELD 3.0 adoption for liver allocation
ESPEN 2020Clinical nutrition in liver disease
Historical OPTNPolicy 9.1.D, effective December 2019
DietXP IntelligenceVersioned deterministic calculation
Source review12 October 2026

FORMULA VERSIONS

Original MELDCr · Bili · INR only · Historical standard
MELD-NaAdds sodium · Pre-2023 UNOS standard
MELD 3.0Adds albumin + sex equity · Active OPTN standard
Adult ScopeNo paediatric or exception-point allocation

MELD methods and sources

MELD 3.0 uses creatinine, total bilirubin, INR, sodium, albumin and the adult sex adjustment. This tool covers people aged 18 or older at registration, or current adults who are not listed. Historical MELD and MELD-Na results are labelled separately.

The current formula limits albumin to 1.5–3.5 g/dL, sodium to 125–137 mmol/L and creatinine to 1–3 mg/dL. Qualifying dialysis uses the creatinine ceiling. Final scores are rounded and bounded to 6–40. Missing sodium, albumin or sex withholds MELD 3.0.

Current OPTN calculator guide · Historical OPTN policy 9.1.D · ESPEN liver nutrition guidance

Sources checked on 12 October 2026. Laboratory model calculation and nutrition assessment are separate. This tool does not calculate an individual mortality percentage or prescribe nutrition treatment.

This adult laboratory calculator supports education and clinical discussion. It does not establish individual mortality, nutrition treatment or organ-allocation priority. Review scores, registration age, exception rules and local policy with a hepatologist or transplant team. Seek urgent assessment for acute liver failure or severe symptoms regardless of the score.

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