Enter the AST enzymes (U/L) and the ALT enzymes (U/L) into the Calculator. The calculator will evaluate the Ast Ratio. 

Ast Ratio Formula



  • AR is the Ast Ratio ()
  • AST is the AST enzymes (U/L)
  • ALT is the ALT enzymes (U/L)

To calculate Ast Ratio, divide the AST enzymes by the ALT enzymes.

How to Calculate Ast Ratio?

The following steps outline how to calculate the Ast Ratio.

  1. First, determine the AST enzymes (U/L). 
  2. Next, determine the ALT enzymes (U/L). 
  3. Next, gather the formula from above = AR = AST / ALT.
  4. Finally, calculate the Ast Ratio.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

AST enzymes (U/L) = 20

ALT enzymes (U/L) = 40