APRI Score Calculator Sponsored Advertising placement AST to Platelet Ratio Index Clinical Decision Tool Calculates APRI from AST, the laboratory AST upper limit and platelet count. AST (U/L) AST upper limit of normal (U/L) Platelets (×10⁹/L) Calculate AST to Platelet Ratio Index Clear Calculator ☆ Log in to save Save this calculator to your MDPDA account. + Add to Toolkit Log in to save incomplete calculator progress and return later. Log in to save progress Clinical Decision Support Only MediCalc calculators are intended to support qualified healthcare professionals and must not replace professional clinical judgement. Do not enter patient-identifiable information into Saved Progress. Read our Clinical Disclaimer Sponsored Advertising placement
