APRI Calculator
AST to platelet ratio index for liver fibrosis.
About APRI Calculator
AST to platelet ratio index for liver fibrosis. The APRI Calculator on Picscaler gives you the answer instantly in your browser, with no sign-up.
Inputs: AST (U/L), AST upper limit of normal (U/L) and Platelet count (x10^9/L). Results shown: APRI and Interpretation.
Formula: APRI = (AST / upper limit of normal) / platelets (x10^9/L) x 100. WHO thresholds for hepatitis B and C. Use your laboratory's AST upper limit.
This tool is for education and information. It does not replace clinical judgement, so confirm results against your laboratory's reference ranges and local guidelines.
How to use APRI Calculator
- Enter AST (U/L), AST upper limit of normal (U/L) and Platelet count (x10^9/L).
- Press Calculate.
- Read APRI and Interpretation in the result table.
- Use the formula and notes under the result to check the working.
Frequently asked questions
Is APRI Calculator free?
Yes. APRI Calculator is completely free to use on Picscaler.
Do I need to create an account?
No. You can use it straight away without signing up.
Is my data safe?
Your input is processed in your browser on your own device and is not uploaded to Picscaler.
Can I use it for medical decisions?
No. It is an educational aid and does not replace professional medical judgement.
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