APC Liver Score Calculator
The APC Liver Score Calculator combines age, serum albumin, and prothrombin time into a single score used to gauge liver function and prognosis. The formula used is: APC = age + (3.1 − albumin) × 10 + (PT − 12) × 5.
Rates and fees change frequently. Always confirm the current figures
with the official authority before relying on this result.
Formula
APC = Age + (3.1-Albumin)×10 + (PT-12)×5
- The APC Liver Score Calculator updates instantly when you change any value.
- Formula: APC = Age + (3.1 − Albumin) × 10 + (PT − 12) × 5
- Input definitions: • Age: patient age in years • Albumin: serum albumin in g/dL (lower albumin raises the score) • Prothrombin: prothrombin time in seconds (longer PT raises the score)
- Lower albumin and a prolonged prothrombin time both indicate poorer liver synthetic function and push the score higher.
- A higher score generally reflects worse liver function and prognosis.
- This is a screening estimate and should be interpreted alongside the full clinical picture.
Example Calculation
Inputs
- Age (years): 50
- Albumin (g/dL): 3.5
- Prothrombin (seconds): 12
For a 50-year-old with albumin 3.5 g/dL and PT 12 s: APC = 50 + (3.1 − 3.5) × 10 + (12 − 12) × 5 = 50 − 4 + 0 = 46.
Frequently asked questions
What does the APC score measure?
It combines age, albumin, and prothrombin time into a single number that reflects liver synthetic function and prognosis.
Why do albumin and prothrombin time matter?
The liver makes albumin and clotting factors. Low albumin and a prolonged prothrombin time both signal reduced liver function, raising the score.
What units should I enter?
Enter age in years, albumin in g/dL, and prothrombin time in seconds.
How is a higher score interpreted?
A higher APC score generally indicates worse liver function. Interpretation should always be made by a clinician using the full clinical context.
Is this a diagnostic tool?
No. It is a screening estimate and does not replace formal assessment or specialist evaluation.