De Ritis Ratio Sponsored Advertising placement De Ritis Ratio Clinical Decision Tool Calculates the AST to ALT ratio. AST U/L ALT U/L Calculate De Ritis Ratio Clear Calculator ☆ Log in to save Save this calculator to your MediCalc account. 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