Ast Alt Ratio Calculator
Calculate the AST/ALT ratio (De Ritis ratio) to help assess liver health. Enter the AST and ALT values to get the ratio and a brief interpretation.
Published by:
isCalculator Editorial Team
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How to use this tool?
AST/ALT Ratio Calculator – Quick Guide
- Enter AST value (in U/L) into the first field. Must be a non-negative number.
- Enter ALT value (in U/L) into the second field. Must be a positive number (cannot be zero).
- Click “Calculate” to compute the ratio.
- Read the result:
- Ratio < 0.8 – suggests non-alcoholic fatty liver disease or viral hepatitis.
- Ratio 0.8–1.2 – normal range (healthy or mild injury).
- Ratio > 1.2 – may indicate alcoholic liver disease or cirrhosis.
- Use the formula shown: AST ÷ ALT = ratio.
All values must be in U/L (same unit). Negative or zero ALT will show an error.
Previous Results
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Frequently Asked Questions
The AST/ALT ratio, also known as the De Ritis ratio, is the ratio of aspartate aminotransferase (AST) to alanine aminotransferase (ALT) in the blood. It is used to help differentiate between causes of liver damage.
A high ratio (greater than 1.2) may indicate alcoholic liver disease, cirrhosis, or other conditions. It should be interpreted by a healthcare professional.
A low ratio (less than 0.8) may suggest non-alcoholic fatty liver disease or viral hepatitis. Always consult a doctor for an accurate diagnosis.
