Merck Manual

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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.