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| Clinical Chemistry SI Conversion Factors a
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Measure
|
Conventional (USA) Units
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Conversion Factor (×)
|
SI Units
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Alkaline phosphatase
|
IU/L
|
1.0
|
U/L
|
|
ALT
|
U/L
|
1.0
|
U/L
|
|
Albumin
|
g/dL
|
10.0
|
g/L
|
|
Ammonia (NH4)
|
μg/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
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Calcium
|
mg/dL
|
0.25
|
mmol/L
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Carbon dioxide
|
mEq/L
|
1.0
|
mmol/L
|
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Chloride
|
mEq/L
|
1.0
|
mmol/L
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Cholesterol
|
mg/dL
|
0.026
|
mmol/L
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Copper
|
μg/dL
|
0.16
|
μmol/L
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Cortisol
|
μg/dL
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27.6
|
nmol/L
|
|
Creatine kinase
|
IU/L
|
1.0
|
U/L
|
|
Creatinine
|
mg/dL
|
88.40
|
μmol/L
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Fibrinogen
|
mg/dL
|
0.01
|
g/L
|
|
Glucose
|
mg/dL
|
0.055
|
mmol/L
|
|
Iron, binding
|
μg/dL
|
0.179
|
μmol/L
|
|
Iron, total
|
μg/dL
|
0.179
|
μmol/L
|
|
Lipase
|
IU/L
|
1
|
U/L
|
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|
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
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|
Protein, total
|
g/dL
|
10.0
|
g/L
|
|
Sodium
|
mEq/L
|
1.0
|
mmol/L
|
|
Triglycerides
|
mg/dL
|
0.011
|
mmol/L
|
|
Triiodothyronine (T3)
|
μg/dL
|
15.6
|
nmol/L
|
|
Thyroxine (T4)
|
μg/dL
|
12.87
|
nmol/L
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Urea nitrogen
|
mg/dL
|
0.357
|
mmol/L
|
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Uric acid
|
mg/dL
|
0.059
|
mmol/L
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Urine protein/creatinine ratio
|
g/g
|
0.113
|
g/mmol
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Xylose absorption
|
mg/dL
|
0.067
|
mmol/L
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a Adapted from Veterinary Laboratory Medicine: Interpretation and Diagnosis, Meyer D.H., Harvey J.W., 3rd ed., Copyright 2004, with permission from Elsevier.
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Last full review/revision March 2012
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