AST/ALT Ratio

Use the same unit for both AST and ALT. Ratio is unitless.
Enter AST between 1 and 5000.
Typical adult range (U/L): ~10–40.
Enter ALT between 1 and 5000.
Typical adult range (U/L): ~7–56.
Calculated AST/ALT Ratio
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ALT-predominant~1:1Mild AST-predominantAST-predominant ≥2
AST
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ALT
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Units
U/L
Typical interpretation (context-dependent):
• Ratio < 0.8: ALT predominance (e.g., many viral or metabolic processes). • ~1.0: Near equal AST and ALT. • 1.2–<2.0: Mild AST predominance. • ≥2.0: AST predominance; consider alcoholic liver disease in the right clinical context. Not diagnostic—always interpret with clinical history, exam, and additional testing.
AST/ALT Ratio: ratio = AST / ALT
Use the same unit for both values (e.g., U/L). The ratio is unitless.
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