Table: Clinical Chemistry SI Conversion Factors

Clinical Chemistry SI Conversion Factors

Measure	Conventional (USA) Units	Conversion Factor (×)	SI Units
Alkaline phosphatase	IU/L	1.0	U/L
ALT	U/L	1.0	U/L
Albumin	g/dL	10.0	g/L
Ammonia (NH₄)	mcg/dL	0.5872	μmol/L
Amylase	Somogyi units	1.85	U/L
AST	U/L	1.0	U/L
Bilirubin	mg/dL	17.10	μmol/L
Calcium	mg/dL	0.25	mmol/L
Carbon dioxide	mEq/L	1.0	mmol/L
Chloride	mEq/L	1.0	mmol/L
Cholesterol	mg/dL	0.026	mmol/L
Copper	mcg/dL	0.16	μmol/L
Cortisol	mcg/dL	27.6	nmol/L
CK	IU/L	1.0	U/L
Creatinine	mg/dL	88.40	μmol/L
Fibrinogen	mg/dL	0.01	g/L
Glucose	mg/dL	0.055	mmol/L
Iron, binding	mcg/dL	0.179	μmol/L
Iron, total	mcg/dL	0.179	μmol/L
Lipase	IU/L	1	U/L
	Cherry-Crandall U	278	U/L
Magnesium	mEq/L	0.5	mmol/L
Osmolality	Osm/kg	1.0	mmol/L
Phosphorus	mg/dL	0.323	mmol/L
Potassium	mEq/L	1.0	mmol/L
Protein, total	g/dL	10.0	g/L
Sodium	mEq/L	1.0	mmol/L
Triglycerides	mg/dL	0.011	mmol/L
Triiodothyronine (T₃)	mcg/dL	15.6	nmol/L
Thyroxine (T₄)	mcg/dL	12.87	nmol/L
Urea nitrogen	mg/dL	0.357	mmol/L
Uric acid	mg/dL	0.059	mmol/L
Urine protein/creatinine ratio	g/g	0.113	g/mmol
Xylose absorption	mg/dL	0.067	mmol/L
Adapted from Veterinary Laboratory Medicine: Interpretation and Diagnosis, Meyer DH, Harvey JW, 3rd ed., Copyright 2004, with permission from Elsevier.

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