King’s Score (Non-Invasive Cirrhosis Marker)
King's Score (Cross 2009): age, AST, INR, and platelets give a non-invasive fibrosis score; below ~12.3 makes significant fibrosis / cirrhosis unlikely and above ~16.7 makes cirrhosis likely.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 40 years
- AST
- 30 IU/L
- INR
- 1.0
- Platelet count
- 200 ×10⁹/L
Result: King's Score 6 — cirrhosis and significant fibrosis unlikely (< 12.3): rule-out band.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- < 12.3
- Cirrhosis and significant fibrosis unlikely — rule-out band.
- 12.3–16.7
- Significant fibrosis (F3-6) likely; indeterminate for cirrhosis.
- ≥ 16.7
- Cirrhosis likely — rule-in band (sensitivity 86%, specificity 80%, NPV 96%). A non-invasive marker alongside FIB-4 and APRI, not a biopsy order.
What you enter
- Age
- AST
- INR
- Platelet count
How this is calculated
Cross TJS, Rizzi P, Berry PA, Bruce M, Portmann B, Harrison PM. King’s Score: an accurate marker of cirrhosis in chronic hepatitis C. Eur J Gastroenterol Hepatol. 2009;21(7):730-738. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.