AST to ALT Ratio Calculator

How to calculate the AST-to-ALT ratio?

The De Ritis ratio compares levels of two liver enzymes to identify potential causes of liver injury.

Formula: Ratio = AST / ALT

Using the Ratio Calculator: An Example

Example: A patient with an AST of 120 U/L and an ALT of 40 U/L.

Step-by-step calculation:

• Identify AST (120) and ALT (40) values
• Divide 120 by 40
• The resulting ratio is 3.0

Frequently Asked Questions

What is a normal AST to ALT ratio?

In most healthy individuals, the ratio is approximately 0.8; however, clinical interpretation depends on the absolute enzyme levels.

What does a ratio over 2.0 suggest?

A ratio greater than 2.0 is often associated with alcoholic liver disease, especially when enzyme levels are elevated.

Is this calculator a diagnostic tool?

No, this is an educational tool. All lab results must be interpreted by a qualified healthcare professional.