SI Conversion Calculator

Enter the desired value below in the Enter Quantity field and click the  button to perform the metric conversion. If you wish to reverse a conversion begin by entering a value in the Conversion Result field and click  to obtain the non SI value.

Table 1. Conversions to Metric Measures

 

Symbol Known Quantity Enter Quantity Multiply by To Find Conversion Result Metric Symbol Convert         
Length
in
inches
2.54
centimeters
cm
ft
feet
30
centimeters
cm
ft
feet
0.3
meters
m
yd
yards
0.9
meters
m
--
miles
1.6
kilometers
km
Area
sq in
square inches
6.5
square centimeters
cm2
sq ft
square feet
0.09
square meters
m2
sq yd
square yard
0.8
square meters
m2
--
square miles
2.6
square kilometers
km2
Mass
oz
ounces
28
grams
g
lb
pounds
0.45
kilograms
kg
Volume
tsp
teaspoons
5
milliliters
mL
tbsp
tablespoons
15
milliliters
mL
fl oz
fluid ounces
30
milliliters
mL
c
cups
0.24
liters
L
pt
US pints
0.47
liters
L
qt
US quarts
0.95
liters
L
gal
US gallons
3.8
liters
L
cu ft
cubic feet
0.03
cubic meters
m3
cu yd
cubic yard
0.76
cubic meters
m3

 

 

Table 2. Selected Laboratory Tests, With Reference Ranges and Conversion Factors

 

Analyte Specimen Conventional Unit Enter Quantity Conversion Factor (Multiply by) Conversion Result SI Unit Convert
Acetaminophen
Serum, plasma
µg/mL
6.614
µmol/L
Acetoacetate
Serum, plasma
mg/dL
97.95
µmol/L
Acetone
Serum, plasma
mg/dL
0.172
mmol/L
Acid phosphatase
Serum
U/L
16.667
nkat/L
Activated partial thromboplastin time (APTT)
Whole blood
s
1
s
Adenosine deaminase
Serum
U/L
16.667
nkat/L
Adrenocorticotropic hormone (ACTH)
Plasma
pg/mL
0.22
pmol/L
Alanine
Plasma
mg/dL
112.2
µmol/L
Alanine aminotransferase (ALT)
Serum
U/L
0.0167
µkat/L
Albumin
Serum
g/dL
10
g/L
Alcohol dehydrogenase
Serum
U/L
16.667
nkat/L
Aldolase
Serum
U/L
0.0167
µkat/L
Aldosterone
Serum, plasma
ng/dL
27.74
pmol/L
Alkaline phosphatase
Serum
U/L
0.0167
µkat/L
Alprazolam
Serum, plasma
ng/mL
3.24
nmol/L
Amikacin
Serum, plasma
µg/mL
1.708
µmol/L
α-Aminobutyric acid
Plasma
mg/dL
96.97
µmol/L
δ-Aminolevulinic acid
Serum
µg/dL
0.0763
µmol/L
Amiodarone
Serum, plasma
µg/mL
1.55
µmol/L
Amitriptyline
Plasma
ng/mL
3.605
nmol/L
Ammonia (as nitrogen)
Serum, plasma
µg/dL
0.714
µmol/L
Amobarbital
Serum
µg/mL
4.42
µmol/L
Amphetamine
Serum, plasma
ng/mL
7.4
nmol/L
Amylase
Serum
U/L
0.0167
µkat/L
Androstenedione
Serum
ng/dL
0.0349
nmol/L
Angiotensin I
Plasma
pg/mL
0.772
pmol/L
Angiotensin II
Plasma
pg/mL
0.957
pmol/L
Angiotensin-converting enzyme
Serum
U/L
16.667
nkat/L
Anion gap Na+–(Cl- + HCO3-)
Serum, plasma
mEq/L
1
mmol/L
Antidiuretic hormone (ADH)
Plasma
pg/mL
0.923
pmol/L
Antithrombin III
Plasma
mg/dL
10
mg/L
α1-Antitrypsin
Serum
mg/dL
0.184
µmol/L
Apolipoprotein A-I
Serum
mg/dL
0.01
g/L
Apolipoprotein B
Serum, plasma
mg/dL
0.01
g/L
Arginine
Serum
mg/dL
57.4
µmol/L
Arsenic
Whole blood
µg/L
0.0133
µmol/L
Asparagine
Plasma
mg/dL
75.689
µmol/L
Aspartate aminotransferase (AST)
Serum
U/L
0.0167
µkat/L
Aspartic acid
Plasma
mg/dL
75.13
µmol/L
Atrial natriuretic hormone
Plasma
pg/mL
1
ng/L
Base excess
Whole blood
mEq/L
1
mmol/L
Bicarbonate
Serum
mEq/L
1
mmol/L
Bile acids (total)
Serum
µg/mL
2.448
µmol/L
Bilirubin, direct (conjugated)
Serum
mg/dL
17.104
µmol/L
Bilirubin, total
Serum
mg/dL
17.104
µmol/L
Biotin
Serum
pg/mL
0.00409
nmol/L
Bismuth
Whole blood
µg/L
4.785
nmol/L
Blood gases
    Carbon dioxide, PC02
Arterial blood
mm Hg
0.133
kPa
    pH
Arterial blood
 
1
 
    Oxygen, PO2
Arterial blood
mm Hg
0.133
kPa
Brain-type natriuretic peptide (BNP)
Plasma
pg/mL
1
ng/L
Bromide (toxic)
Serum
µg/mL
0.0125
mmol/L
C1 esterase inhibitor
Serum
mg/dL
10
mg/L
C3 complement
Serum
mg/dL
0.01
g/L
C4 complement
Serum
mg/dL
0.01
g/L
Cadmium
Whole blood
µg/L
8.896
nmol/L
Caffeine
Serum, plasma
µg/mL
5.15
µmol/L
Calcitonin
Plasma
pg/mL
0.292
pmol/L
Calcium, ionized
Serum
mg/dL
0.25
mmol/L
Calcium, total
Serum
mg/dL
0.25
mmol/L
Cancer antigen (CA) 125
Serum
U/mL
1
kU/L
Carbamazepine
Serum, plasma
µg/mL
4.233
µmol/L
Carbon dioxide (total)
Serum, plasma
mEq/L
1
mmol/L
Carboxyhemoglobin, toxic
Whole blood
%
0.01
Proportion of 1.0
Carcinoembryonic antigen (CEA)
Serum
ng/mL
1
µg/L
β-Carotene
Serum
µg/dL
0.01863
µmol/L
Carotenoids
Serum
µg/dL
0.01863
µmol/L
Ceruloplasmin
Serum
mg/dL
10
mg/L
Chloramphenicol
Serum
µg/mL
3.095
µmol/L
Chlordiazepoxide
Serum, plasma
µg/mL
3.336
µmol/L
Chloride
Serum, plasma
mEq/L
1
mmol/L
Chlorpromazine
Plasma
ng/mL
3.136
nmol/L
Chlorpropamide
Plasma
mg/L
3.61
µmol/L
 
 
 
 
 
 
 
Cholesterol
Total
Serum, plasma
mg/dL
0.0259
mmol/L
Cholesterol, high-density (HDL)
Serum, plasma
mg/dL
0.0259
mmol/L
Cholesterol, low-density (LDL)
Serum, plasma
mg/dL
0.0259
mmol/L
Cholinesterase
Serum
U/L
1.0
kU/L
Chorionic gonadotropin (ß-hCG) (nonpregnant)
Serum
mIU/mL
1
IU/L
Chromium
Whole blood
µg/L
19.232
nmol/L
Citrate
Serum
mg/dL
52.05
µmol/L
Citrulline
Plasma
mg/dL
57.081
µmol/L
Clonazepam
Serum
ng/mL
3.167
nmol/L
Clonidine
Serum, plasma
ng/mL
4.35
nmol/L
Clozapine
Serum
ng/mL
0.003
µmol/L
Coagulation factor I
Plasma
g/dL
29.41
µmol/L
    (Fibrinogen)
Plasma
mg/dL
0.01
g/L
Coagulation factor II (prothrombin)
Plasma
%
0.01
Proportion of 1.0
Coagulation factor V
Plasma
%
0.01
Proportion of 1.0
Coagulation factor VII
Plasma
%
0.01
Proportion of 1.0
Coagulation factor VIII
Plasma
%
0.01
Proportion of 1.0
Coagulation factor IX
Plasma
%
0.01
Proportion of 1.0
Coagulation factor X
Plasma
%
0.01
Proportion of 1.0
Coagulation factor XI
Plasma
%
0.01
Proportion of 1.0
Coagulation factor XII
Plasma
%
0.01
Proportion of 1.0
Cobalt
Serum
µg/L
16.968
nmol/L
Cocaine (toxic)
Serum
ng/mL
3.297
nmol/L
Codeine
Serum
ng/mL
3.34
nmol/L
Coenzyme Q10 (ubiquinone)
Plasma
µg/mL
1
mg/L
Copper
Serum
µg/dL
0.157
µmol/L
Coproporphyrin
Urine
µg/24 h
1.527
µmol/d
Corticotropin
Plasma
pg/mL
0.22
pmol/L
Cortisol
Serum, plasma
µg/dL
27.588
nmol/L
Cotinine
Plasma
µg/L
5.675
nmol/L
C-peptide
Serum
ng/mL
0.331
nmol/L
C-reactive protein
Serum
mg/dL
10
mg/L
Creatine
Serum
mg/dL
76.25
µmol/L
Creatine kinase (CK)
Serum
U/L
0.0167
µkat/L
Creatine kinase–MB fraction
Serum
ng/mL
1
µg/L
Creatinine
Serum, plasma
mg/dL
88.4
µmol/L
Creatinine clearance
Serum, plasma
mL/min/1.73 m2
0.0167
mL/s/m2
Cyanide (toxic)
Whole blood
µg/mL
38.4
µmol/L
Cyclic adenosine monophosphate (cAMP)
Plasma
ng/mL
3.04
µmol/L
Cyclosporine
Serum
ng/mL
0.832
nmol/L
Cystine
Plasma
mg/dL
41.615
µmol/L
D-dimer
Plasma
µg/mL
5.476
nmol/L
Dehydroepiandrosterone (DHEA)
Serum
ng/mL
3.47
nmol/L
Dehydroepiandrosterone sulfate (DHEA-S)
Serum
µg/dL
0.027
µmol/L
Deoxycorticosterone
Serum
ng/dL
0.0303
nmol/L
Desipramine
Serum, plasma
ng/mL
3.754
nmol/L
Diazepam
Serum, plasma
ng/mL
0.0035
µmol/L
Digoxin
Plasma
ng/mL
1.281
nmol/L
Diltiazem
Serum
mg/L
2.412
µmol/L
Disopyramide
Serum, plasma
µg/mL
2.946
µmol/L
Dopamine
Plasma
pg/mL
6.528
pmol/L
Doxepin
Serum, plasma
ng/mL
3.579
nmol/L
Electrophoresis (protein)
    Proportion of total protein
        Albumin
Serum
%
0.01
Proportion of 1.0
        α1-Globulin
Serum
%
0.01
Proportion of 1.0
        α2-Globulin
Serum
%
0.01
Proportion of 1.0
        ß-Globulin
Serum
%
0.01
Proportion of 1.0
        γ-Globulin
Serum
%
0.01
Proportion of 1.0
    Concentration
        Albumin
Serum
g/dL
10
g/L
        α1-Globulin
Serum
g/dL
10
g/L
        α2-Globulin
Serum
g/dL
10
g/L
        ß-Globulin
Serum
g/dL
10
g/L
        γ-Globulin
Serum
g/dL
10
g/L
Ephedrine (toxic)
Serum
µg/mL
6.052
µmol/L
Epinephrine
Plasma
pg/mL
5.459
pmol/L
Erythrocyte sedimentation rate
Whole blood
mm/h
1
mm/h
Erythropoietin
Serum
mIU/mL
1
IU/L
Estradiol (E2 )
Serum
pg/mL
3.671
pmol/L
Estriol (E3 )
Serum
ng/mL
3.467
nmol/L
Estrogens (total)
Serum
pg/mL
1
ng/L
Estrone (E1 )
Serum, plasma
pg/mL
3.698
pmol/L
Ethanol (ethyl alcohol)
Serum, whole blood
mg/dL
0.2171
mmol/L
Ethchlorvynol (toxic)
Serum, plasma
µg/mL
6.915
µmol/L
Ethosuximide
Serum
mg/L
7.084
µmol/L
Ethylene glycol (toxic)
Serum, plasma
mg/dL
0.1611
mmol/L
Fatty acids (nonesterified)
Serum, plasma
mg/dL
0.0355
mmol/L
Fecal fat (as stearic acid)
Stool
g/d
1
g/24 h
Fentanyl
Serum
µg/mL
2.972
µmol/L
Ferritin
Serum
ng/mL
1
µg/L
α1-Fetoprotein
Serum
ng/mL
1
µg/L
Fibrin degradation products
Plasma
µg/mL
1
mg/L
Fibrinogen
Plasma
mg/dL
0.01
g/L
Flecainide
Serum, plasma
µg/mL
2.413
µmol/L
Fluoride
Whole blood
mg/dL
0.5263
mmol/L
Fluoxetine
Serum
ng/mL
0.00323
µmol/L
Flurazepam (toxic)
Serum, plasma
µg/mL
2.578
µmol/L
Folate (folic acid)
Serum
ng/mL
2.266
nmol/L
Follicle-stimulating hormone (FSH)
Serum, plasma
mIU/mL
1
IU/L
Fructosamine
Serum
mg/L
5.581
mmol/L
Fructose
Serum
mg/dL
55.506
µmol/L
Galactose
Serum, plasma
mg/dL
0.0555
mmol/L
Gastrin
Serum
pg/mL
0.481
pmol/L
Gentamicin
Serum
µg/mL
2.09
µmol/L
Glucagon
Plasma
pg/mL
1
ng/L
Glucose
Serum
mg/dL
0.0555
mmol/L
Glucose-6-phosphate dehydrogenase
Whole blood
U/g hemoglobin
0.0167
nkat/g hemoglobin
Glutamic acid
Plasma
mg/dL
67.967
µmol/L
Glutamine
Plasma
mg/dL
68.423
µmol/L
γ-Glutamyltransferase (GGT)
Serum
U/L
0.0167
µkat/L
Glutethimide
Serum
µg/mL
4.603
µmol/L
Glycerol (free)
Serum
mg/dL
0.1086
mmol/L
Glycine
Plasma
mg/dL
133.2
µmol/L
Gold
Serum
µg/dL
50.77
nmol/L
Growth hormone (GH)
Serum
ng/mL
1
µg/L
Haloperidol
Serum, plasma
ng/mL
2.66
nmol/L
Haptoglobin
Serum
mg/dL
10
mg/L
Hematocrit
Whole blood
%
0.01
Proportion of 1.0
Hemoglobin
Whole blood
g/dL
10
g/L
    Mean corpuscular hemoglobin (MCH)
Whole blood
pg/cell
1
pg/cell
    Mean corpuscular hemoglobin concentration (MCHC)
Whole blood
g/dL
10
g/L
    Mean corpuscular volume (MCV)
Whole blood
µm3
1
fL
Hemoglobin A1c (glycated hemoglobin)
Whole blood
% of total hemoglobin
0.01
Proportion of total hemoglobin
    Dual report as mmol/mol
Hemoglobin A2
Whole blood
%
0.01
Proportion of 1.0
Histamine
Plasma
µg/L
8.997
nmol/L
Histidine
Plasma
mg/dL
64.45
µmol/L
Homocysteine
Plasma
mg/L
7.397
µmol/L
Homovanillic acid
Urine
mg/24 h
5.489
µmol/d
Hydrocodone
Serum
µg/mL
3.34
µmol/L
Hydromorphone
Serum
µg/mL
3504
nmol/L
β-Hydroxybutyric acid
Plasma
mg/dL
96.06
µmol/L
5-Hydroxyindoleacetic acid (5-HIAA)
Urine
mg/24 h
5.23
µmol/d
Hydroxyproline
Plasma
mg/dL
76.266
µmol/L
Ibuprofen
Serum
µg/mL
4.848
µmol/L
Imipramine
Plasma
ng/mL
3.566
nmol/L
Immunoglobulin A (IgA)
Serum
mg/dL
0.01
g/L
Immunoglobulin D (IgD)
Serum
mg/dL
10
mg/L
Immunoglobulin E (IgE)
Serum
mg/dL
10
mg/L
Immunoglobulin G (IgG)
Serum
mg/dL
0.01
g/L
Immunoglobulin M (IgM)
Serum
mg/dL
0.01
g/L
Insulin
Serum
µIU/mL
6.945
pmol/L
Insulinlike growth factor
Serum
ng/mL
0.131
nmol/L
Iodine
Serum
µg/L
7.88
nmol/L
Iron
Serum
µg/dL
0.179
µmol/L
Iron-binding capacity
Serum
µg/dL
0.179
µmol/L
Isoleucine
Plasma
mg/dL
76.236
µmol/L
Isoniazid
Plasma
µg/mL
7.291
µmol/L
Isopropanol (toxic)
Serum, plasma
mg/L
0.0166
mmol/L
Kanamycin
Serum, plasma
µg/mL
2.064
µmol/L
Ketamine
Serum
µg/mL
4.206
µmol/L
17-Ketosteroids
Urine
mg/24 h
3.33
µmol/d
Lactate
Plasma
mg/dL
0.111
mmol/L
Lactate dehydrogenase (LDH)
Serum
U/L
0.0167
µkat/L
LDH isoenzymes
    LD1
Serum
%
0.01
Proportion of 1.0
    LD2
Serum
%
0.01
Proportion of 1.0
    LD3
Serum
%
0.01
Proportion of 1.0
    LD4
Serum
%
0.01
Proportion of 1.0
    LD5
Serum
%
0.01
Proportion of 1.0
Lead
Serum
µg/dL
0.0483
µmol/L
Leucine
Plasma
mg/dL
76.237
µmol/L
Lidocaine
Serum, plasma
µg/mL
4.267
µmol/L
Lipase
Serum
U/L
0.0167
µkat/L
Lipoprotein(a) [Lp(a)]
Serum
mg/dL
0.1
mg/L
Lithium
Serum
mEq/L
1
mmol/L
Lorazepam
Serum
ng/mL
3.114
nmol/L
Luteinizing hormone (LH)
Serum, plasma
mIU/mL
1
IU/L
Lycopene
Serum
mg/L
1.863
µmol/L
Lysergic acid diethylamide
Serum
µg/mL
3092
nmol/L
Lysine
Plasma
mg/dL
68.404
µmol/L
Lysozyme
Serum, plasma
mg/dL
10
mg/L
Magnesium
Serum
mg/dL
0.4114
mmol/L
Manganese
Whole blood
µg/L
18.202
nmol/L
Maprotiline
Plasma
ng/mL
1
µg/L
Melatonin
Serum
ng/L
4.305
pmol/L
Meperidine
Serum, plasma
ng/mL
4.043
nmol/L
Mercury
Serum
µg/L
4.985
nmol/L
Metanephrine (total)
Urine
mg/24 h
5.07
µmol/d
Metformin
Serum
µg/mL
7.742
µmol/L
Methadone
Serum, plasma
ng/mL
0.00323
µmol/L
Methamphetamine
Serum
µg/mL
6.7
µmol/L
Methanol
Plasma
µg/mL
0.0312
mmol/L
Methaqualone
Serum, plasma
µg/mL
3.995
µmol/L
Methemoglobin
Whole blood
g/dL
155
µmol/L
Methemoglobin
Whole blood
% of total hemoglobin
0.01
Proportion of total hemoglobin
Methicillin
Serum
mg/L
2.636
µmol/L
Methionine
Plasma
mg/dL
67.02
µmol/L
Methotrexate
Serum, plasma
mg/L
2200
nmol/L
Methyldopa
Plasma
µg/mL
4.735
µmol/L
Metoprolol
Serum, plasma
ng/mL
3.74
nmol/L
ß 2 -Microglobulin
Serum
mg/L
1
mg/L
Morphine
Serum, plasma
ng/mL
3.504
nmol/L
Myoglobin
Serum
µg/L
0.05814
nmol/L
Naproxen
Serum
µg/mL
4.343
µmol/L
Niacin (nicotinic acid)
Urine
mg/24 h
8.123
µmol/d
Nickel
Whole blood
µg/L
17.033
nmol/L
Nicotine
Plasma
mg/L
6.164
µmol/L
Nitrogen (nonprotein)
Serum
mg/dL
0.714
mmol/L
Nitroprusside (as thiocyanate)
 
µg/mL
17.2
µmol/L
Norepinephrine
Plasma
pg/mL
5.911
pmol/L
Nortriptyline
Serum, plasma
ng/mL
3.797
nmol/L
Ornithine
Plasma
mg/dL
75.666
µmol/L
Osmolality
Serum
mOsm/kg
1
mmol/kg
Osteocalcin
Serum
ng/mL
1
µg/L
Oxalate
Serum
mg/mL
11.107
µmol/L
Oxazepam
Serum, plasma
µg/mL
3.487
µmol/L
Oxycodone
Serum
ng/mL
3.171
nmol/L
Oxygen, partial pressure (Po 2 )
Arterial blood
mm Hg
0.133
kPa
Paraquat
Whole blood
µg/mL
5.369
µmol/L
Parathyroid hormone
Serum
pg/mL
1
ng/L
Pentobarbital
Serum, plasma
µg/mL
4.419
µmol/L
Pepsinogen
Serum
ng/mL
1
µg/L
Phencyclidine (toxic)
Serum, plasma
ng/mL
4.109
nmol/L
Phenobarbital
Serum, plasma
µg/mL
4.31
µmol/L
Phenylalanine
Plasma
mg/dL
60.544
µmol/L
Phenylpropanolamine
Serum
µg/mL
6613
nmol/L
Phenytoin
Serum, plasma
mg/L
3.968
µmol/L
Phosphorus (inorganic)
Serum
mg/dL
0.323
mmol/L
Placental lactogen
Serum
µg/mL
46.296
nmol/L
Plasminogen (antigenic)
Plasma
mg/dL
0.113
µmol/L
Plasminogen activator inhibitor
Plasma
ng/mL
22.19
pmol/L
Platelet count (thrombocytes)
Whole blood
×103L
1
×109/L
Potassium
Serum
mEq/L
1
mmol/L
Prealbumin
Serum
mg/dL
10
mg/L
Pregnanediol
Urine
mg/24 h
3.12
µmol/d
Pregnanetriol
Urine
mg/24 h
2.972
µmol/d
Primidone
Serum, plasma
µg/mL
4.582
µmol/L
Procainamide
Serum, plasma
µg/mL
4.25
µmol/L
Progesterone
Serum
ng/mL
3.18
nmol/L
Prolactin
Serum
ng/L
1
µg/L
Proline
Plasma
mg/dL
86.858
µmol/L
Propoxyphene
Plasma
µg/mL
2.946
µmol/L
Propranolol
Serum
ng/mL
3.856
nmol/L
Prostate-specific antigen
Serum
ng/mL
1
µg/L
Protein (total)
Serum
g/dL
10
g/L
Prothrombin time (PT)
Plasma
s
1
s
Protoporphyrin
Red blood cells
µg/dL
0.0178
µmol/L
Protriptyline
Serum, plasma
µg/dL
3.787
nmol/L
Pyruvate
Plasma
mg/dL
113.56
µmol/L
Quinidine
Serum
µg/mL
3.082
µmol/L
Red blood cell count
Whole blood
×106L
1
×1012/L
Renin
Plasma
pg/mL
0.0237
pmol/L
Reticulocyte count
Whole blood
×103L
1
×109/L
Reticulocyte count
Whole blood
% of red blood cells
0.01
Proportion of red blood cells
Rifampin
Serum
mg/L
1.215
µmol/L
Salicylates
Serum, plasma
µg/mL
7.24
µmol/L
Selenium
Serum, plasma
µg/L
0.0127
µmol/L
Serine
Plasma
mg/dL
95.156
µmol/L
Serotonin (5-hydroxytryptamine)
Whole blood
ng/mL
0.00568
µmol/L
Sex hormone-binding globulin
Serum
µg/mL
8.896
nmol/L
Sodium
Serum
mEq/L
1
mmol/L
Somatomedin C (insulinlike growth factor)
Serum
ng/mL
0.131
nmol/L
Somatostatin
Plasma
pg/mL
0.611
pmol/L
Streptomycin
Serum
mg/L
1.719
µmol/L
Strychnine
Whole blood
mg/L
2.99
µmol/L
Substance P
Plasma
pg/mL
0.742
pmol/L
Sulfate
Serum
mg/L
10.41
µmol/L
Sulfmethemoglobin
Whole blood
% of total hemoglobin
0.01
Proportion of total hemoglobin
Taurine
Plasma
mg/dL
79.91
µmol/L
Testosterone
Serum
ng/dL
0.0347
nmol/L
Tetrahydrocannabinol
Serum
µg/mL
3.18
µmol/L
Theophylline
Serum, plasma
µg/mL
5.55
µmol/L
Thiopental
Serum, plasma
µg/mL
4.144
µmol/L
Thioridazine
Serum, plasma
µg/mL
2.699
µmol/L
Threonine
Plasma
mg/dL
84
µmol/L
Thrombin time
Plasma
s
1
s
Thyroglobulin
Serum
ng/mL
1
µg/L
Thyrotropin
Serum
mIU/L
1
mIU/L
Thyroxine, free (FT 4 )
Serum
ng/dL
12.871
pmol/L
Thyroxine, total (T 4 )
Serum
µg/dL
12.871
nmol/L
Thyroxine-binding globulin
Serum
µg/mL
17.094
nmol/L
Tissue plasminogen activator
Plasma
IU/mL
1000
IU/L
Tobramycin
Serum, plasma
µg/mL
2.139
µmol/L
Tocainide
Serum
µg/mL
5.201
µmol/L
Tolbutamide
Serum
µg/mL
3.7
µmol/L
Transferrin
Serum
mg/dL
0.123
µmol/L
Triglycerides
Serum
mg/dL
0.0113
mmol/L
Triiodothyronine, free (FT3)
Serum
pg/dL
0.0154
pmol/L
Triiodothyronine, total (T3)
Serum
ng/dL
0.0154
nmol/L
Troponin I
Serum
ng/mL
1
µg/L
Troponin T
Serum
ng/mL
1
µg/L
Tryptophan
Plasma
mg/dL
48.967
µmol/L
Tyrosine
Plasma
mg/dL
55.19
µmol/L
Urea nitrogen
Serum
mg/dL
0.357
mmol/L
Uric acid
Serum
mg/dL
0.0595
mmol/L
Urobilinogen
Urine
mg/24 h
1.7
µmol/d
Valine
Plasma
mg/dL
85.361
µmol/L
Valproic acid
Serum, plasma
µg/mL
6.934
µmol/L
Vancomycin
Serum, plasma
µg/mL
0.69
µmol/L
Vanillylmandelic acid (VMA)
Urine
mg/24 h
5.046
µmol/d
Vasoactive intestinal polypeptide
Plasma
pg/mL
0.296
pmol/L
Vasopressin
Plasma
pg/mL
0.923
pmol/L
Verapamil
Serum, Plasma
ng/mL
2.2
nmol/L
Vitamin A (retinol)
Serum
µg/dL
0.0349
µmol/L
Vitamin B1 (thiamine)
Serum
µg/dL
29.6
nmol/L
Vitamin B2 (riboflavin)
Serum
µg/dL
26.6
nmol/L
Vitamin B3
Whole blood
µg/mL
4.56
µmol/L
Vitamin B6 (pyridoxine)
Plasma
ng/mL
4.046
nmol/L
Vitamin B12
Serum
pg/mL
0.7378
pmol/L
Vitamin C (ascorbic acid)
Serum
mg/dL
56.78
µmol/L
Vitamin D (1,25 dihydroxyvitamin D)
Serum
pg/mL
2.4
pmol/L
Vitamin D (25-hydroxyvitamin D)
Plasma
ng/mL
2.496
nmol/L
Vitamin E (α-tocopherol)
Serum
µg/mL
2.322
µmol/L
Vitamin K
Serum
ng/mL
2.22
nmol/L
Warfarin
Serum, plasma
µg/mL
3.247
µmol/L
White blood cell count
Whole blood
L
0.001
×109/L
    Differential count
        Neutrophils-segmented
Whole blood
L
0.001
×109/L
        Neutrophils-bands
Whole blood
L
0.001
×109/L
        Lymphocytes
Whole blood
L
0.001
×109/L
        Monocytes
Whole blood
L
0.001
×109/L
        Eosinophils
Whole blood
L
0.001
×109/L
        Basophils
Whole blood
L
0.001
×109/L
    Differential count (number fraction)
        Neutrophils-segmented
Whole blood
%
0.01
Proportion of 1.0
        Neutrophils-bands
Whole blood
%
0.01
Proportion of 1.0
        Lymphocytes
Whole blood
%
0.01
Proportion of 1.0
        Monocytes
Whole blood
%
0.01
Proportion of 1.0
        Eosinophils
Whole blood
%
0.01
Proportion of 1.0
        Basophils
Whole blood
%
0.01
Proportion of 1.0
Zidovudine
Serum, plasma
µg/mL
3.7
µmol/L
Zinc
Serum
µg/dL
0.153
µmol/L

 


aThe laboratory values are provided for illustration only and are not intended to be comprehensive or definitive. Each laboratory determines its own values.
The information in this table is adapted from and based on the following sources: (1) Kratz A, Ferraro M, Sluss PM, Lewandrowski KB. Laboratory reference values. N Engl J Med. 2004;351(15):1548-1563; (2) Young DS, Huth EJ. SI Units for Clinical Measurement. Philadelphia, PA: American College of Physicians; 1998; (3) McPherson R, Pincus M, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 22 ed. Elsevier Saunders; 2012; (4) Goldman L, Schaeffer AI. Goldman-Cecil Medicine. 25th ed. Elsevier Saunders; 2015; (5) Longo D, et al. Harrison's Principles of Internal Medicine. 18th ed. McGraw-Hill Professional; 2011; (6) Lipoprotein a Foundation. Accessed August 1, 2019. https://www.lipoproteinafoundation.org./page/UnderstandLPA ; (7) Laposta M, ed. Laboratory Medicine: The Diagnosis of Disease in the Clinical Laboratory. 2nd ed. McGraw-Hill Education; 2014