AST to ALT Ratio (De Ritis) Calculator

The De Ritis ratio. Two liver enzymes are more informative divided by each other than read one at a time.

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Your AST to ALT Ratio (De Ritis)

Reference bands

ResultBand
Under 1.0Commonly seen with fatty liver patterns
1.0 to 2.0Intermediate
Above 2.0Warrants clinical review

The De Ritis ratio. ⚠️ Interpretation depends heavily on whether the enzymes themselves are raised; a ratio calculated from two normal enzymes means little.

One number is one line of your test.

BloodMarker reads your whole panel and tells you what the lines say together, which is the part no single calculation can do.

Your values carry over · PDF or a photo · about 8 seconds

Questions

What is the De Ritis ratio?

It is AST divided by ALT, first described in 1957 as a way of distinguishing patterns of liver injury.

Does a ratio above 2 mean liver disease?

No. It is a pattern that a clinician would investigate alongside the actual enzyme values, your history and other tests.

Other calculators

Not medical advice. These calculators are for information only. Reference bands differ between laboratories and none of these numbers can be interpreted without your history, your other results and a clinician. Nothing you type here is sent to us or stored on a server.