CLIF-C ACLF Calculator
Use this calculator to estimate the CLIF-C ACLF score for patients with acute-on-chronic liver failure (ACLF). This score is used for short-term prognostic support and should always be interpreted in full clinical context.
Educational use only. Not a diagnosis or treatment recommendation.
What is an ACLF calculator?
An ACLF calculator is a clinical support tool that estimates prognosis in acute-on-chronic liver failure. In this page, the calculator uses the CLIF-C ACLF scoring approach, which combines age, systemic inflammation (WBC), and organ failure burden (CLIF-OF) into one standardized number.
Rather than replacing bedside judgment, this score helps teams communicate risk, prioritize monitoring intensity, and support decisions around escalation of care, transplant evaluation, and goals-of-care conversations.
Formula used in this calculator
This page uses the commonly referenced CLIF-C ACLF equation:
The result is displayed on a 0–100 scale (clamped in this tool for readability). Higher values indicate higher short-term mortality risk.
How to use the calculator correctly
1) Confirm your source values first
Before entering numbers, verify that your CLIF-OF and WBC values are recent and derived from the same clinical window. Mixed-time data can distort the score.
2) Enter units carefully
WBC must be entered in ×10⁹/L. Unit mismatch is one of the most common reasons for wrong risk estimates in bedside tools.
3) Read the score as a risk signal, not a verdict
Scores are most useful when combined with trend data, trajectory over 24–72 hours, infection status, renal function changes, and response to treatment.
General risk interpretation bands
These bands are practical, educational groupings to simplify interpretation:
- <45: Lower relative short-term risk (still clinically significant in ACLF context).
- 45–54: Intermediate risk; requires close reassessment.
- 55–64: High risk; evaluate for rapid escalation and specialist input.
- ≥65: Very high risk; urgent multidisciplinary planning is often needed.
Local protocols and published data should always guide final interpretation.
Clinical limitations you should know
- Scores do not capture every factor (e.g., nuanced hemodynamics, frailty, treatment response).
- Single-point scores are weaker than serial reassessment.
- Data quality (timing, lab reliability, unit conversion) can materially alter output.
- No calculator can replace specialist hepatology/ICU clinical judgment.
Frequently asked questions
Is this the same as MELD or MELD-Na?
No. MELD-based scores and CLIF-based ACLF scores are related but distinct tools with different variable sets and use cases.
Can I use this for self-diagnosis?
No. This tool is intended for educational and professional support use. Patients should seek direct care from qualified clinicians.
Should one high score trigger major decisions alone?
Typically no. High scores are warning signals that should trigger deeper evaluation, repeated scoring, and team-based decision-making.