The following table provides factors for converting conventional units to SI
units for selected clinical data. Source:
JAMA
Author Instructions.
Conversion:
- to convert from the conventional unit to the SI unit, multiply by
the conversion factor;
- to convert from the SI unit to the conventional unit, divide by the
conversion factor.
Testosterone |
ng/dL |
0.0347 |
nmol/L |
-
Component
|
Conventional
Unit |
Conversion
Factor |
SI
Unit
|
Acetaminophen |
µg/mL |
6.62 |
µmol/L |
Acetoacetic
acid |
mg/dL |
0.098 |
mmol/L |
Acetone |
mg/dL |
0.172 |
mmol/L |
Acid
phosphatase |
units/L |
1.0 |
U/L |
Alanine |
mg/dL |
112.2 |
µmol/L |
Alanine
aminotransferase (ALT) |
units/L |
1.0 |
U/L |
Albumin |
g/dL |
10 |
g/L |
Alcohol
dehydrogenase |
units/L |
1.0 |
U/L |
Aldolase |
units/L |
1.0 |
U/L |
Aldosterone |
ng/dL |
0.0277 |
nmol/L |
Alkaline
phosphatase |
units/L |
1.0 |
U/L |
Aluminum |
ng/mL |
0.0371 |
µmol/L |
Aminobutyric
acid |
mg/dL |
97 |
µmol/L |
Amitriptyline |
ng/mL |
3.61 |
nmol/L |
Ammonia
(as NH3) |
µg/dL |
0.587 |
µmol/L |
Amylase |
units/L |
1.0 |
U/L |
Androstenedione |
ng/dL |
0.0349 |
nmol/L |
Angiotensin
I |
pg/mL |
0.772 |
pmol/L |
Angiotensin
II |
pg/mL |
0.957 |
pmol/L |
Anion
gap |
mEq/L |
1.0 |
mmol/L |
Antidiuretic
hormone |
pg/mL |
0.923 |
pmol/L |
Antithrombin
III |
mg/dL |
10 |
mg/L |
alpha1-Antitrypsin |
mg/dL |
0.184 |
µmol/L |
Apolipoprotein
A |
mg/dL |
0.01 |
g/L |
Apolipoprotein
B |
mg/dL |
0.01 |
g/L |
Arginine |
mg/dL |
57.4 |
µmol/L |
Asparagine |
mg/dL |
75.7 |
µmol/L |
Aspartate
aminotransferase (AST) |
units/L |
1.0 |
U/L |
Bicarbonate |
mEq/L |
1.0 |
mmol/L |
Bilirubin |
mg/dL |
17.1 |
µmol/L |
Blood
gases (arterial) |
|
|
|
Paco2 |
mm
Hg |
1.0 |
mm
Hg |
pH |
pH
units |
1.0 |
pH
units |
Pao2 |
mm
Hg |
1.0 |
mm
Hg |
Bromide |
mg/dL |
0.125 |
mmol/L |
C-peptide |
ng/mL |
0.333 |
nmol/L |
C1
esterase inhibitor |
mg/dL |
10 |
mg/L |
C3
complement |
mg/dL |
0.01 |
g/L |
C4
complement |
mg/dL |
0.01 |
g/L |
Calcitonin |
pg/mL |
1.0 |
ng/L |
Calcium |
mg/dL |
0.25 |
mmol/L |
|
mEq/L |
0.50 |
mmol/L |
Carbon
dioxide |
mEq/L |
1.0 |
mmol/L |
Carboxyhemoglobin |
%
of
hemoglobin saturation |
0.01 |
Proportion
of
hemoglobin saturation |
Carotene |
µg/dL |
0.0186 |
µmol/L |
Ceruloplasmin |
mg/dL |
10 |
mg/L |
Chloride |
mEq/L |
1.0 |
mmol/L |
Cholesterol |
mg/dL |
0.0259 |
mmol/L |
Citrate |
mg/dL |
52.05 |
µmol/L |
Copper |
µg/dL |
0.157 |
µmol/L |
Coproporphyrins
(urine) |
µg/24
hr |
1.527 |
nmol/d |
Corticotropin
(ACTH) |
pg/mL |
0.22 |
pmol/L |
Cortisol |
µg/dL |
27.59 |
nmol/L |
Cotinine |
ng/mL |
5.68 |
nmol/L |
Creatine |
mg/dL |
76.26 |
µmol/L |
Creatine
kinase (CK) |
units/L |
1.0 |
U/L |
Creatinine |
mg/dL |
88.4 |
µmol/L |
Creatinine
clearance |
mL/min |
0.0167 |
mL/s |
Cyanide |
mg/L |
23.24 |
µmol/L |
Dehydroepiandrosterone
(DHEA) |
ng/mL |
3.47 |
nmol/L |
Desipramine |
ng/mL |
3.75 |
nmol/L |
Diazepam |
µg/mL |
3.512 |
µmol/L |
Digoxin |
ng/mL |
1.281 |
nmol/L |
Epinephrine |
pg/mL |
5.46 |
pmol/L |
Erythrocyte
sedimentation rate |
mm/h |
1.0 |
mm/h |
Estradiol |
pg/mL |
3.671 |
pmol/L |
Estriol |
ng/mL |
3.467 |
nmol/L |
Estrone |
ng/dL |
37 |
pmol/L |
Ethanol
(ethyl alcohol) |
mg/dL |
0.217 |
mmol/L |
Ethylene
glycol |
mg/L |
16.11 |
µmol/L |
Ferritin |
ng/mL |
2.247 |
pmol/L |
alpha
-Fetoprotein |
ng/mL |
1.0 |
µg/L |
Fibrinogen |
mg/dL |
0.0294 |
µmol/L |
Fluoride |
µg/mL |
52.6 |
µmol/L |
Folate |
ng/mL |
2.266 |
nmol/L |
Follicle-stimulating
hormone |
mIU/mL |
1.0 |
IU/L |
Fructose |
mg/dL |
55.5 |
µmol/L |
Galactose |
mg/dL |
55.506 |
µmol/L |
Glucagon |
pg/mL |
1.0 |
ng/L |
Glucose |
mg/dL |
0.0555 |
mmol/L |
Glutamine |
mg/dL |
68.42 |
µmol/L |
gamma
-Glutamyltransferase (GGT) |
units/L |
1.0 |
U/L |
Glycated
hemoglobin (glycosylated
hemoglobin A1, A1C) |
%
of total
hemoglobin |
0.01 |
Proportion
of total
hemoglobin |
Glycerol
(free) |
mg/dL |
108.59 |
µmol/L |
Glycine |
mg/dL |
133.3 |
µmol/L |
Haptoglobin |
mg/dL |
0.10 |
µmol/L |
Hematocrit |
% |
0.01 |
Proportion
of 1.0 |
Hemoglobin
(whole blood)
Mass concentration |
g/dL |
10.0
0.6206 |
g/L
mmol/L |
High-density
lipoprotein cholesterol (HDL-C) |
mg/dL |
0.0259 |
mmol/L |
Histidine |
mg/dL |
64.45 |
µmol/L |
Homocysteine
(total) |
mg/L |
7.397 |
µmol/L |
Human
chorionic gonadotropin (HCG) |
mlU/mL |
1.0 |
IU/L |
Hydroxybutyric
acid |
mg/dL |
96.05 |
µmol/L |
Hydroxyproline |
mg/dL |
76.3 |
µmol/L |
Immunoglobulin
A (IgA) |
mg/dL |
0.01 |
g/L |
Immunoglobulin
D (IgD) |
mg/dL |
10 |
mg/L |
Immunoglobulin
E (IgE) |
mg/dL |
10 |
mg/L |
Immunoglobulin
G (IgG) |
mg/dL |
0.01 |
g/L |
Immunoglobulin
M (IgM) |
mg/dL |
0.01 |
g/L |
Insulin |
µIU/mL |
6.945 |
pmol/L |
Iron,
total |
µg/dL |
0.179 |
µmol/L |
Iron
binding capacity, total |
µg/dL |
0.179 |
µmol/L |
lsoleucine |
mg/dL |
76.24 |
µmol/L |
lsopropanol |
mg/L |
0.0166 |
mmol/L |
Lactate
(lactic acid) |
mg/dL |
0.111 |
mmol/L |
Lactate
dehydrogenase |
units/L |
1 |
U/L |
Lactate
dehydrogenase
isoenzymes (LD1-LD5) |
% |
0.01 |
Proportion
of 1.0 |
Lead |
µg/dL |
0.0483 |
µmol/L |
Leucine |
mg/dL |
76.237 |
µmol/L |
Lipase |
units/L |
1.0 |
U/L |
Lipids
(total) |
mg/dL |
0.01 |
g/L |
Lipoprotein
(a) |
mg/dL |
0.0357 |
µmol/L |
Lithium |
mEq/L |
1.0 |
mmol/L |
Low-density
lipoprotein
cholesterol (LDL-C) |
mg/dL |
0.0259 |
mmol/L |
Luteinizing
hormone (LH, leutropin) |
IU/L |
1.0 |
lU/L |
Lysine |
mg/dL |
68.5 |
µmol/L |
Magnesium |
mg/dL |
0.411 |
mmol/L |
|
mEq/L |
0.50 |
mmol/L |
Manganese |
ng/mL |
18.2 |
nmol/L |
Methanol |
mg/L |
0.0312 |
mmol/L |
Methemoglobin |
%
of total
hemoglobin |
0.01 |
Proportion
of total
hemoglobin |
Methionine |
mg/dL |
67.02 |
µmol/L |
Myoglobin |
µg/L |
0.0571 |
nmol/L |
Nicotine |
mg/L |
6.164 |
µmol/L |
Nitrogen,
nonprotein |
mg/dL |
0.714 |
mmol/L |
Norepinephrine |
pg/mL |
0.00591 |
nmol/L |
Ornithine |
mg/dL |
75.67 |
µmol/L |
Osmolality |
mOsm/kg |
1.0 |
mmol/kg |
Osteocalcin |
µg/L |
0.171 |
nmol/L |
Oxalate |
mg/L |
11.1 |
µmol/L |
Parathyroid
hormone |
pg/mL |
1.0 |
ng/L |
Phenobarbital |
mg/L |
4.31 |
µmol/L |
Phenylalanine |
mg/dL |
60.54 |
µmol/L |
Phenytoin |
µg/mL |
3.96 |
µmol/L |
Phosphorus |
mg/dL |
0.323 |
mmol/L |
Plasminogen |
mg/dL |
0.113 |
µmol/L |
|
% |
0.01 |
Proportion
of 1.0 |
Plasminogen
activator inhibitor |
mIU/mL |
1.0 |
IU/L |
Platelets
(thrombocytes) |
x
103/µL |
1.0 |
x
109/L |
Potassium |
mEq/L |
1.0 |
mmol/L |
Pregnanediol
(urine) |
mg/24h |
3.12 |
µmol/d |
Pregnanetriol
(urine) |
mg/24
h |
2.97 |
µmol/d |
Progesterone |
ng/mL |
3.18 |
nmol/L |
Prolactin |
µg/L |
43.478 |
pmol |
Proline |
mg/dL |
86.86 |
µmol/L |
Prostate-specific
antigen |
ng/mL |
1.0 |
µg/L |
Protein,
total |
g/dL |
10.0 |
g/L |
Prothrombin |
g/L |
13.889 |
µmol/L |
Prothrombin
time (protime, PT) |
s |
1.0 |
s |
Protoporphyrin,
erythrocyte |
µg/dL |
0.01777 |
µmol/L |
Pyruvate |
mg/dL |
113.6 |
µmol/L |
Quinidine |
µg/mL |
3.08 |
µmol/L |
Red
blood cell count |
x
106/µL |
1.0 |
x
1012/L |
Renin |
pg/mL |
0.0237 |
pmol/L |
Reticulocyte
count |
%
of RBCs |
0.01 |
Proportion
of 1.0 |
Salicylate |
mg/L |
0.00724 |
mmol/L |
Serine |
mg/dL |
95.2 |
µmol/L |
Serotonin
(5-hydroxytryptamine) |
ng/mL |
0.00568 |
µmol/L |
Sodium |
mEq/L |
1.0 |
mmol/L |
Somatomedin-C
(insulinlike growth factor) |
ng/mL |
0.131 |
nmol/L
(coagulation factor II) |
Somatostatin |
pg/mL |
0.611 |
pmol/L |
Taurine |
mg/dL |
79.91 |
µmol/L |
Testosterone |
ng/dL |
0.0347 |
nmol/L |
Theophylline |
µg/mL |
5.55 |
µmol/L |
Thiocyanate |
mg/L |
17.2 |
µmol/L |
Threonine |
mg/dL |
83.95 |
µmol/L |
Thyroglobulin |
ng/mL |
1.0 |
µg/L |
Thyrotropin
(thyroid-stimulating
hormone, TSH) |
mIU/L |
1.0 |
mIU/L |
Thyroxine,
free (T4) |
ng/dL |
12.87 |
pmol/L |
Thyroxine,
total (T4) |
µg/dL |
12.87 |
nmol/L |
Transferrin |
mg/dL |
0.01 |
g/L |
Triglycerides |
mg/dL |
0.0113 |
mmol/L |
Triiodothyronine |
|
|
|
Free
(T3) |
pg/dL |
0.0154 |
pmol/L |
Resin
uptake |
% |
0.01 |
Proportion
of 1.0 |
Total
(T3) |
ng/dL |
0.0154 |
nmol/L |
Troponin
I (cardiac) |
ng/mL |
1.0 |
µg/L |
Troponin
T (cardiac) |
ng/mL |
1.0 |
µg/L |
Tryptophan |
mg/dL |
48.97 |
µmol/L |
Tyrosine |
mg/dL |
55.19 |
µmol/L |
Urea
nitrogen |
mg/dL |
0.357 |
mmol/L |
Uric
acid |
mg/dL |
59.48 |
µmol/L |
Valine |
mg/dL |
85.5 |
µmol/L |
Vasoactive
intestinal
polypeptide |
pg/mL |
1.0 |
ng/L |
Vitamin
A (retinol) |
µg/dL |
0.0349 |
µmol/L |
Vitamin
B6 (pyridoxine) |
ng/mL |
4.046 |
nmol/L |
Vitamin
B12 (cyanocobalamin) |
pg/mL |
0.738 |
pmol/L |
Vitamin
C (ascorbic acid) |
mg/dL |
56.78 |
µmol/L |
Vitamin
D |
|
|
|
1,25-Dihydroxyvitamin
D |
pg/mL |
2.6 |
pmol/L |
25-Hydroxyvitamin
D |
ng/mL |
2.496 |
nmol/L |
Vitamin
E |
mg/dL |
23.22 |
µmol/L |
Vitamin
K |
ng/mL |
2.22 |
nmol/L |
Warfarin |
µg/mL |
3.247 |
µmol/L |
White
blood cell count |
x
103/µL |
1.0 |
x
109/L |
White
blood cell differential
count (number fraction) |
% |
0.01 |
Proportion
of 1.0 |
Zinc |
µg/dL |
0.153 |
µmol/L |