Analyte
Specimen
Reference Range, Conventional Unit
Conventional Unit
Enter Quantity
Conversion Factor (Multiply by)
Reference Range, SI Unit
Conversion Result
SI Unit
Convert
Acetaminophen
Serum, plasma
10-30
µg/mL
6.614
66-200
µmol/L
Acetoacetate
Serum, plasma
<1
mg/dL
97.95
<100
µmol/L
Acetone
Serum, plasma
<1.0
mg/dL
0.172
<0.17
mmol/L
Acid phosphatase
Serum
<5.5
U/L
16.667
<90
nkat/L
Activated partial thromboplastin time (APTT)
Whole blood
25-40
s
1
25-40
s
Adenosine deaminase
Serum
11.5-25.0
U/L
16.667
190-420
nkat/L
Adrenocorticotropic hormone (ACTH)
Plasma
<120
pg/mL
0.22
<26
pmol/L
Alanine
Plasma
1.87-5.89
mg/dL
112.2
210-661
µmol/L
Alanine aminotransferase (ALT)
Serum
10-40
U/L
0.0167
0.17-0.68
µkat/L
Albumin
Serum
3.5-5.0
g/dL
10
35-50
g/L
Alcohol dehydrogenase
Serum
<2.8
U/L
16.667
<47
nkat/L
Aldolase
Serum
1.0-7.5
U/L
0.0167
0.02-0.13
µkat/L
Aldosterone
Serum, plasma
2-9
ng/dL
27.74
55-250
pmol/L
Alkaline phosphatase
Serum
30-120
U/L
0.0167
0.5-2.0
µkat/L
Alprazolam
Serum, plasma
10-50
ng/mL
3.24
32-162
nmol/L
Amikacin
Serum, plasma
20-30
µg/mL
1.708
34-52
µmol/L
α-Aminobutyric acid
Plasma
0.08-0.36
mg/dL
96.97
8-35
µmol/L
δ-Aminolevulinic acid
Serum
15-23
µg/dL
0.0763
1.1-8.0
µmol/L
Amiodarone
Serum, plasma
0.5-2.5
µg/mL
1.55
0.8-3.9
µmol/L
Amitriptyline
Plasma
120-250
ng/mL
3.605
433-903
nmol/L
Ammonia (as nitrogen)
Serum, plasma
15-45
µg/dL
0.714
11-32
µmol/L
Amobarbital
Serum
1-5
µg/mL
4.42
4-22
µmol/L
Amphetamine
Serum, plasma
20-30
ng/mL
7.4
148-222
nmol/L
Amylase
Serum
27-131
U/L
0.0167
0.46-2.23
µkat/L
Androstenedione
Serum
75-205
ng/dL
0.0349
2.6-7.2
nmol/L
Angiotensin I
Plasma
<25
pg/mL
0.772
<15
pmol/L
Angiotensin II
Plasma
10-60
pg/mL
0.957
0.96-58
pmol/L
Angiotensin-converting enzyme
Serum
<40
U/L
16.667
<670
nkat/L
Anion gap Na+ –(Cl- + HCO3 - )
Serum, plasma
8-16
mEq/L
1
8-16
mmol/L
Antidiuretic hormone (ADH)
Plasma
1-5
pg/mL
0.923
0.9-4.6
pmol/L
Antithrombin III
Plasma
21-30
mg/dL
10
210-300
mg/L
α1 -Antitrypsin
Serum
78-200
mg/dL
0.184
14.5-36.5
µmol/L
Apolipoprotein A-I
Serum
80-151
mg/dL
0.01
0.8-1.5
g/L
Apolipoprotein B
Serum, plasma
50-123
mg/dL
0.01
0.5-1.2
g/L
Arginine
Serum
0.37-2.40
mg/dL
57.05
21-138
µmol/L
Arsenic
Whole blood
<2-23
µg/L
0.0133
0.03-0.31
µmol/L
Asparagine
Plasma
0.40-0.91
mg/dL
75.689
30-69
µmol/L
Aspartate aminotransferase (AST)
Serum
10-30
U/L
0.0167
0.17-0.51
µkat/L
Aspartic acid
Plasma
<0.3
mg/dL
75.13
<25
µmol/L
Atrial natriuretic hormone
Plasma
20-77
pg/mL
0.325
6.5-2.5
pmol/L
Base excess
Whole blood
–2 to 3
mEg/L
1
–2 to 3
mmol/L
Bicarbonate
Serum
21-28
mEq/L
1
21-28
mmol/L
Bile acids (total)
Serum
0.3-2.3
µg/mL
2.448
0.73-5.63
µmol/L
Bilirubin, total
Serum
0.3-1.2
mg/dL
17.104
5.0-21.0
µmol/L
Bilirubin, direct (conjugated)
Serum
0.1-0.3
mg/dL
17.104
1.7-5.1
µmol/L
Biotin
Serum
200-500
pg/mL
0.00409
0.82-2.05
nmol/L
Bismuth
Whole blood
1-12
µg/L
4.785
4.8-57.4
nmol/L
Blood gases
Carbon dioxide, Pco 2
Arterial blood
35-45
mm Hg
0.133
4.7-5.9
kPa
pH
Arterial blood
7.35-7.45
1
7.35-7.45
Oxygen, Po 2
Arterial blood
80-100
mm Hg
0.133
11-13
kPa
Brain-type natriuretic peptide (BNP)
Plasma
<167
pg/mL
1
<167
ng/L
Bromide (toxic)
Serum
>1250
µg/mL
0.0125
>15.6
mmol/L
C1 esterase inhibitor
Serum
12-30
mg/dL
10
120-300
mg/L
C3 complement
Serum
1200-1500
µg/mL
0.001
1.2-1.5
g/L
C4 complement
Serum
350-600
µg/mL
0.001
0.35-0.60
g/L
Cadmium
Whole blood
0.3-1.2
µg/L
8.896
2.7-10.7
nmol/L
Caffeine
Serum, plasma
3-15
µg/L
0.515
2.5-7.5
µmol/L
Calcitonin
Plasma
3-26
pg/mL
0.292
0.8-7.6
pmol/L
Calcium, ionized
Serum
4.60-5.08
mg/dL
0.25
1.15-1.27
mmol/L
Calcium, total
Serum
8.2-10.2
mg/dL
0.25
2.05-2.55
mmol/L
Cancer antigen (CA) 125
Serum
<35
U/mL
1
<35
kU/L
Carbamazepine
Serum, plasma
8-12
µg/mL
4.233
34-51
µmol/L
Carbon dioxide (total)
Serum, plasma
22-28
mEq/L
1
22-28
mmol/L
Carboxyhemoglobin, toxic
Whole blood
>20
%
0.01
>0.2
Proportion of 1.0
Carcinoembryonic antigen (CEA)
Serum
<3.0
ng/mL
1
<3.0
µg/L
β-Carotene
Serum
10-85
µg/dL
0.01863
0.2-1.6
µmol/L
Carotenoids
Serum
50-300
µg/dL
0.01863
0.9-5.6
µmol/L
Ceruloplasmin
Serum
20-40
mg/dL
10
200-400
mg/L
Chloramphenicol
Serum
10-25
µg/mL
3.095
31-77
µmol/L
Chlordiazepoxide
Serum, plasma
0.4-3.0
µg/mL
3.336
1.3-10.0
µmol/L
Chloride
Serum, plasma
96-106
mEq/L
1
96-106
mmol/L
Chlorpromazine
Plasma
50-300
ng/mL
3.126
157-942
nmol/L
Chlorpropamide
Plasma
75-250
mg/L
3.61
270-900
µmol/L
Cholesterol (total)
Desirable
Serum, plasma
<200
mg/dL
0.0259
<5.18
mmol/L
Borderline high
Serum, plasma
200-239
mg/dL
0.0259
5.18-6.18
mmol/L
High
Serum, plasma
≥240
mg/dL
0.0259
≥6.21
mmol/L
Cholesterol, high-density (HDL) (low level)
Serum, plasma
<40
mg/dL
0.0259
<1.03
mmol/L
Cholesterol, low-density (LDL) (high level)
Serum, plasma
>160
mg/dL
0.0259
4.144
mmol/L
Cholinesterase
Serum
5-12
mg/L
2.793
14-39
nmol/L
Chorionic gonadotropin (ß-hCG ) (nonpregnant)
Serum
5
mIU/mL
1
5
IU/L
Chromium
Whole blood
0.7-28.0
µg/L
19.232
13.4-538.6
nmol/L
Citrate
Serum
1.2-3.0
mg/dL
52.05
60-160
µmol/L
Citrulline
Plasma
0.2-1.0
mg/dL
57.081
12-55
µmol/L
Clonazepam
Serum
10-50
ng/mL
0.317
0.4-15.8
nmol/L
Clonidine
Serum, plasma
1.0-2.0
ng/mL
4.35
4.4-8.7
nmol/L
Clozapine
Serum
200-350
ng/mL
0.003
0.6-1.0
µmol/L
Coagulation factor I
Plasma
0.15-0.35
g/dL
29.41
4.4-10.3
µmol/L
(Fibrinogen)
Plasma
150-350
mg/dL
0.01
1.5-3.5
g/L
Coagulation factor II (prothrombin)
Plasma
70-130
%
0.01
0.70-1.30
Proportion of 1.0
Coagulation factor V
Plasma
70-130
%
0.01
0.70-1.30
Proportion of 1.0
Coagulation factor VII
Plasma
60-140
%
0.01
0.60-1.40
Proportion of 1.0
Coagulation factor VIII
Plasma
50-200
%
0.01
0.50-2.00
Proportion of 1.0
Coagulation factor IX
Plasma
70-130
%
0.01
0.70-1.30
Proportion of 1.0
Coagulation factor X
Plasma
70-130
%
0.01
0.70-1.30
Proportion of 1.0
Coagulation factor XI
Plasma
70-130
%
0.01
0.70-1.30
Proportion of 1.0
Coagulation factor XII
Plasma
70-130
%
0.01
0.70-1.30
Proportion of 1.0
Cobalt
Serum
4.0-10.0
µg/L
16.968
67.9-169.7
nmol/L
Cocaine (toxic)
Serum
>1000
ng/mL
3.297
>3300
nmol/L
Codeine
Serum
10-100
ng/mL
3.34
33-334
nmol/L
Coenzyme Q10 (ubiquinone)
Plasma
0.5-1.5
µg/mL
1
0.5-1.5
mg/L
Copper
Serum
70-140
µg/dL
0.157
44866
µmol/L
Coproporphyrin
Urine
<200
µg/24 h
1.527
<300
µmol/d
Corticotropin
Plasma
<120
pg/mL
0.22
<26
pmol/L
Cortisol
Serum, plasma
5-25
µg/dL
27.588
140-690
nmol/L
Cotinine
Plasma
0-8
µg/L
5.675
0-45
nmol/L
C-peptide
Serum
0.5-2.5
ng/mL
0.331
0.17-0.83
nmol/L
C-reactive protein
Serum
0.08-3.1
mg/L
9.524
0.76-28.5
nmol/L
Creatine
Serum
0.1-0.4
mg/dL
76.25
8-31
µmol/L
Creatine kinase (CK)
Serum
40-150
U/L
0.0167
0.67-2.5
µkat/L
Creatine kinase–MB fraction
Serum
0-7
ng/mL
1
0-7
µg/L
Creatinine
Serum, plasma
0.6-1.2
mg/dL
88.4
53-106
µmol/L
Creatinine clearance
Serum, plasma
75-125
mL/min/1.73m2
0.0167
1.24-2.08
mL/s/m2
Cyanide (toxic)
Whole blood
>1.0
µg/mL
23.24
>23
µmol/L
Cyclic adenosine monophosphate (cAMP)
Plasma
4.6-8.6
ng/mL
3.04
14-26
µmol/L
Cyclosporine
Serum
100-400
ng/mL
0.832
83-333
nmol/L
Cystine
Plasma
0.40-1.40
mg/dL
41.615
16-60
µmol/L
D-dimer
Plasma
<0.5
µg/mL
5.476
<3.0
nmol/L
Dehydroepiandrosterone (DHEA)
Serum
1.8-12.5
ng/mL
3.47
6.2-43.3
nmol/L
Dehydroepiandrosterone sulfate (DHEA-S)
Serum
50-450
µg/dL
0.027
1.6-12.2
µmol/L
Deoxycorticosterone
Serum
2-19
ng/dL
0.0303
61-576
nmol/L
Desipramine
Serum, plasma
50-200
ng/mL
3.754
170-700
nmol/L
Diazepam
Serum, plasma
100-1000
ng/mL
0.0035
0.35-3.51
µmol/L
Digoxin
Plasma
0.5-2.0
ng/mL
1.281
0.6-2.6
nmol/L
Diltiazem
Serum
<200
mg/L
2.412
<480
µmol/L
Disopyramide
Serum, plasma
2.8-7.0
µg/mL
2.946
8.3-22.0
µmol/L
Dopamine
Plasma
<87
pg/mL
6.528
<475
pmol/L
Doxepin
Serum, plasma
30-150
ng/mL
3.579
108-538
nmol/L
Electrophoresis (protein)
Proportion of total protein
Albumin
Serum
52-65
%
0.01
0.52-0.65
Proportion of 1.0
α1 -Globulin
Serum
2.5-5.0
%
0.01
0.025-0.05
Proportion of 1.0
α2 -Globulin
Serum
7.0-13.0
%
0.01
0.07-0.13
Proportion of 1.0
ß-Globulin
Serum
8.0-14.0
%
0.01
0.08-0.14
Proportion of 1.0
γ-Globulin
Serum
12.0-22.0
%
0.01
0.12-0.22
Proportion of 1.0
Concentration
Albumin
Serum
3.2-5.6
g/dL
10
32-56
g/L
α1 -Globulin
Serum
0.1-0.4
g/dL
10
1-10
g/L
α2 -Globulin
Serum
0.4-1.2
g/dL
10
4-12
g/L
ß-Globulin
Serum
0.5-1.1
g/dL
10
5-11
g/L
γ-Globulin
Serum
0.5-1.6
g/dL
10
5-16
g/L
Ephedrine (toxic)
Serum
>2
µg/mL
6.052
>12.1
µmol/L
Epinephrine
Plasma
<60
pg/mL
5.459
<330
pmol/L
Erythrocyte sedimentation rate
Whole blood
0-20
mm/h
1
0-20
mm/h
Erythropoietin
Serum
5-36
IU/L
1
5-36
IU/L
Estradiol (E 2 )
Serum
30-400
pg/mL
3.671
110-1470
pmol/L
Estriol (E 3 )
Serum
5-40
ng/mL
3.467
17.4-138.8
nmol/L
Estrogens (total)
Serum
60-400
pg/mL
1
60-400
ng/L
Estrone (E 1 )
Serum, plasma
1.5-25.0
pg/mL
3.698
5.5-92.5
pmol/L
Ethanol (ethyl alcohol)
Serum, whole blood
<20
mg/dL
0.2171
<4.3
mmol/L
Ethchlorvynol (toxic)
Serum, plasma
>20
µg/mL
6.915
>138
µmol/L
Ethosuximide
Serum
40-100
mg/L
7.084
280-700
µmol/L
Ethylene glycol (toxic)
Serum, plasma
>30
mg/dL
0.1611
>5
mmol/L
Fatty acids (nonesterified)
Serum, plasma
8-25
mg/dL
0.0355
0.28-0.89
mmol/L
Fecal fat (as stearic acid)
Stool
2.0-6.0
g/d
1
2-6
g/24 h
Fenfluramine
Serum
0.04-0.30
µg/mL
4.324
0.18-1.30
µmol/L
Fentanyl
Serum
0.01-0.10
µg/mL
2.972
0.02-0.30
µmol/L
Ferritin
Serum
15-200
ng/mL
2.247
33-450
pmol/Lng/mL
α1 -Fetoprotein
Serum
<10
ng/mL
1
<10
µg/L
Fibrin degradation products
Plasma
<10
µg/mL
1
<10
mg/L
Fibrinogen
Plasma
200-400
mg/dL
0.0294
5.8-11.8
µmol/L
Flecanide
Serum, plasma
0.2-1.0
µg/mL
2.413
0.5-2.4
µmol/L
Fluoride
Whole blood
<0.05
mg/dL
0.5263
<0.027
mmol/L
Fluoxetine
Serum
200-1100
ng/mL
0.00323
0.65-3.56
µmol/L
Flurazepam (toxic)
Serum, plasma
>0.2
µg/mL
2.5
>0.5
µmol/L
Folate (folic acid)
Serum
3-16
ng/mL
2.266
7-36
nmol/L
Follicle-stimulating hormone (FSH)
Serum, plasma
1-100
mIU/mL
1
1-100
IU/L
Fructosamine
Serum
36-50
mg/L
5.581
200-280
mmol/L
Fructose
Serum
1-6
mg/dL
55.506
55-335
µmol/L
Galactose
Serum, plasma
<20
mg/dL
0.0555
<1.10
mmol/L
Gastrin
Serum
25-90
pg/mL
0.481
12-45
pmol/L
Gentamicin
Serum
6-10
µg/mL
2.09
12-21
µmol/L
Glucagon
Plasma
20-100
pg/mL
1
20-100
ng/L
Glucose
Serum
70-110
mg/dL
0.0555
3.9-6.1
mmol/L
Glucose-6-phosphate dehydrogenase
Whole blood
10-14
U/g hemoglobin
0.0167
0.17-0.24
nkat/g hemoglobin
Glutamic acid
Plasma
0.2-2.8
mg/dL
67.967
15-190
µmol/L
Glutamine
Plasma
6.1-10.2
mg/dL
68.423
420-700
µmol/L
γ-Glutamyltransferase (GGT)
Serum
2-30
U/L
0.0167
0.03-0.51
µkat/L
Glutethimide
Serum
2-6
µg/mL
4.603
9-28
µmol/L
Glycerol (free)
Serum
0.3-1.72
mg/dL
0.1086
0.32-0.187
mmol/L
Glycine
Plasma
0.9-4.2
mg/dL
133.2
120-560
µmol/L
Gold
Serum
<10
µg/dL
50.77
<500
nmol/L
Growth hormone (GH)
Serum
0-18
ng/mL
1
0-18
µg/L
Haloperidol
Serum, Plasma
6-24
ng/mL
2.66
16-65
nmol/L
Haptoglobin
Serum
26-185
mg/dL
10
260-1850
mg/L
Hematocrit
Whole blood
41-50
%
0.01
0.41-0.50
Proportion of 1.0
Hemoglobin
Whole blood
14.0-17.5
g/dL
10
140-175
g/L
Mean corpuscular hemoglobin (MCH)
Whole blood
26-34
pg/cell
1
26-34
pg/cell
Mean corpuscular hemoglobin concentration (MCHC)
Whole blood
33-37
g/dL
10
330-370
g/L
Mean corpuscular volume (MCV)
Whole blood
80-100
µm3
1
80-100
fL
Hemoglobin A 1c (glycated hemoglobin)
Whole blood
4-7
% of total hemoglobin
0.01
0.04-0.07
Proportion of total hemoglobin
Hemoglobin A 2
Whole blood
2.0-3.0
%
0.01
0.02-0.03
Proportion of 1.0
Histamine
Plasma
0.5-1.0
µg/L
8.997
4.5-9.0
nmol/L
Histidine
Plasma
0.5-1.7
mg/dL
64.45
32-110
µmol/L
Homocysteine
Plasma
0.68-2.02
mg/L
7.397
5-15
µmol/L
Homovanillic acid
Urine
1.4-8.8
mg/24 h
5.489
8-48
µmol/d
Hydrocodone
Serum
<0.02
µg/mL
3.34
<0.06
µmol/L
Hydromorphone
Serum
0.008-0.032
µg/mL
3504
28-112
nmol/L
β-Hydroxybutyric acid
Plasma
<3.0
mg/dL
96.06
<300
µmol/L
5-Hydroxyindoleacetic acid (5-HIAA)
Urine
2-6
mg/24 h
5.23
10.4-31.2
µmol/d
Hydroxyproline
Plasma
<0.55
mg/dL
76.266
<42
µmol/L
Ibuprofen
Serum
10-50
µg/mL
4.848
50-243
µmol/L
Imipramine
Plasma
150-250
ng/mL
3.566
536-893
nmol/L
Immunoglobulin A (IgA)
Serum
40-350
mg/dL
10
400-3500
mg/L
Immunoglobulin D (IgD)
Serum
0-8
mg/dL
10
0-80
mg/L
Immunoglobulin E (IgE)
Serum
0-1500
µg/L
0.001
0-1.5
mg/L
Immunoglobulin G (IgG)
Serum
650-1600
mg/dL
0.01
6.5-16.0
g/L
Immunoglobulin M (IgM)
Serum
54-300
mg/dL
10
550-3000
mg/L
Insulin
Serum
2.0-20
µIU/mL
6.945
14-140
pmol/L
Insulinlike growth factor
Serum
130-450
ng/mL
0.131
18-60
nmol/L
Iodine
Serum
58-77
µg/L
7.88
450-580
nmol/L
Iron
Serum
60-150
µg/dL
0.179
10.7-26.9
µmol/L
Iron-binding capacity
Serum
250-450
µg/dL
0.179
44.8-80.6
µmol/L
Isoleucine
Plasma
0.5-1.3
mg/dL
76.236
40-100
µmol/L
Isoniazid
Plasma
1-7
µg/mL
7.291
7-51
µmol/L
Isopropanol (toxic)
Serum, plasma
>400
mg/L
0.0166
>6.64
mmol/L
Kanamycin
Serum, plasma
25-35
µg/mL
2.08
52-72
µmol/L
Ketamine
Serum
0.2-6.3
µg/mL
4.206
0.8-26
µmol/L
17-Ketosteroids
Urine
3-12
mg/24 h
3.33
10-42
µmol/d
Lactate
Plasma
5.0-15
mg/dL
0.111
0.6-1.7
mmol/L
Lactate dehydrogenase (LDH)
Serum
100-200
U/L
0.0167
1.7-3.4
µkat/L
LDH isoenzymes
LD1
Serum
17-27
%
0.01
0.17-0.27
Proportion of 1.0
LD2
Serum
27-37
%
0.01
0.27-0.37
Proportion of 1.0
LD3
Serum
18-25
%
0.01
0.18-0.25
Proportion of 1.0
LD4
Serum
3-8
%
0.01
0.03-0.08
Proportion of 1.0
LD5
Serum
0-5
%
0.01
0-0.05
Proportion of 1.0
Lead
Serum
<10-20
µg/dL
0.0483
<0.5-1.0
µmol/L
Leucine
Plasma
1.0-2.3
mg/dL
76.237
75-175
µmol/L
Lidocaine
Serum, plasma
1.5-6.0
µg/mL
4.267
6.4-25.6
µmol/L
Lipase
Serum
31-186
U/L
0.0167
0.5-3.2
µkat/L
Lipoprotein(a) [Lp(a)]
Serum
10-30
mg/dL
0.0357
0.35-1.0
µmol/L
Lithium
Serum
0.6-1.2
mEq/L
1
0.6-1.2
mmol/L
Lorazepam
Serum
50-240
ng/mL
3.114
156-746
nmol/L
Luteinizing hormone (LH)
Serum, plasma
1-104
mIU/mL
1
1-104
IU/L
Lycopene
Serum
0.15-0.25
mg/L
1.863
0.28-0.46
µmol/L
Lysergic acid diethylamide
Serum
<0.004
µg/mL
3726
<15
nmol/L
Lysine
Plasma
1.2-3.5
mg/dL
68.404
80-240
µmol/L
Lysozyme
Serum, plasma
0.4-1.3
mg/dL
10
4-13
mg/L
Magnesium
Serum
1.3-2.1
mEq/L
0.5
0.65-1.05
mmol/L
Manganese
Whole blood
10-12
µg/L
18.202
182-218
nmol/L
Maprotiline
Plasma
200-600
ng/mL
1
200-600
µg/L
Melatonin
Serum
10-15
ng/L
4.305
45-66
pmol/L
Meperidine
Serum, plasma
400-700
ng/mL
4.043
1620-2830
nmol/L
Mercury
Serum
<5
µg/L
4.985
<25
nmol/L
Metanephrine (total)
Urine
<1.0
mg/24 h
5.07
<5
µmol/d
Metformin
Serum
1-4
µg/mL
7.742
8-30
µmol/L
Methadone
Serum, plasma
100-400
ng/mL
0.00323
0.32-1.29
µmol/L
Methamphetamine
Serum
0.01-0.05
µg/mL
6.7
0.07-0.34
µmol/L
Methanol
Plasma
<200
µg/mL
0.0312
<6.2
mmol/L
Methaqualone
Serum, plasma
2-3
µg/mL
4
8-12
µmol/L
Methemoglobin
Whole blood
<0.24
g/dL
155
<37.2
µmol/L
Methemoglobin
Whole blood
<1.0
% of total hemoglobin
0.01
<0.01
Proportion of total hemoglobin
Methicillin
Serum
8-25
mg/L
2.636
22-66
µmol/L
Methionine
Plasma
0.1-0.6
mg/dL
67.02
6-40
µmol/L
Methotrexate
Serum, plasma
0.04-0.36
mg/L
2200
90-790
nmol/L
Methyldopa
Plasma
1-5
µg/mL
4.735
5.0-25
µmol/L
Metoprolol
Serum, plasma
75-200
ng/mL
3.74
281-748
nmol/L
ß 2 -Microglobulin
Serum
1.2-2.8
mg/L
1
1.2-2.8
mg/L
Morphine
Serum, plasma
10-80
ng/mL
3.504
35-280
nmol/L
Myoglobin
Serum
19-92
µg/L
0.0571
1.0-5.3
nmol/L
Naproxen
Serum
26-70
µg/mL
4.343
115-300
µmol/L
Niacin (nicotinic acid)
Urine
2.4-6.4
mg/24 h
7.3
17.5-46.7
µmol/d
Nickel
Whole blood
1.0-28.0
µg/L
17.033
17-476
nmol/L
Nicotine
Plasma
0.01-0.05
mg/L
6.164
0.062-0.308
µmol/L
Nitrogen (nonprotein)
Serum
20-35
mg/dL
0.714
14.3-25.0
mmol/L
Nitroprusside (as thiocyanate)
6-29
µg/mL
17.2
103-500
µmol/L
Norepinephrine
Plasma
110-410
pg/mL
5.911
650-2423
pmol/L
Nortriptyline
Serum, plasma
50-150
ng/mL
3.797
190-570
nmol/L
Ornithine
Plasma
0.4-1.4
mg/dL
75.666
30-106
µmol/L
Osmolality
Serum
275-295
mOsm/kg
1
275-295
mmol/kg
Osteocalcin
Serum
3.0-13.0
ng/mL
1
3.0-13.0
µg/L
Oxalate
Serum
1.0-2.4
mg/mL
11.107
11-27
µmol/L
Oxazepam
Serum, plasma
0.2-1.4
µg/mL
3.487
0.7-4.9
µmol/L
Oxycodone
Serum
10-100
ng/mL
3.171
32-317
nmol/L
Oxygen, partial pressure (Po 2 )
Arterial blood
80-100
mm Hg
0.133
11-13
kPa
Paraquat
Whole blood
0.1-1.6
µg/mL
5.369
0.5-8.5
µmol/L
Parathyroid hormone
Serum
10-65
pg/mL
1
10-65
ng/L
Pentobarbital
Serum, plasma
1-5
µg/mL
4.439
4.0-22
µmol/L
Pepsinogen
Serum
28-100
ng/mL
1
28-100
µg/L
Phencyclidine (toxic)
Serum, plasma
90-800
ng/mL
4.109
370-3288
nmol/L
Phenobarbital
Serum, plasma
15-40
µg/mL
4.31
65-172
µmol/L
Phenylalanine
Plasma
0.6-1.5
mg/dL
60.544
35-90
µmol/L
Phenylpropanolamine
Serum
0.05-0.10
µg/mL
6613
330-660
nmol/L
Phenytoin
Serum, plasma
10-20
mg/L
3.968
40-79
µmol/L
Phosphorus (inorganic)
Serum
2.3-4.7
mg/dL
0.323
0.74-1.52
mmol/L
Placental lactogen
Serum
0.5-1.1
µg/mL
46.296
23-509
nmol/L
Plasminogen (antigenic)
Plasma
10-20
mg/dL
0.113
1.1-2.2
µmol/L
Plasminogen activator inhibitor
Plasma
4-40
ng/mL
19.231
75-750
pmol/L
Platelet count (thrombocytes)
Whole blood
150-350
×103 /µL
1
150-350
×109 /L
Porphyrins (total)
Urine
20-120
µg/L
1.203
25-144
nmol/L
Potassium
Serum
3.5-5.0
mEq/L
1
3.5-5.0
mmol/L
Prealbumin
Serum
19.5-35.8
mg/dL
10
195-358
mg/L
Pregnanediol
Urine
<2.6
mg/24 h
3.12
<8
µmol/d
Pregnanetriol
Urine
<2.5
mg/24 h
2.972
<7.5
µmol/d
Primidone
Serum, plasma
5-12
µg/mL
4.582
23-55
µmol/L
Procainamide
Serum, plasma
4-10
µg/mL
4.25
17-42
µmol/L
Progesterone
Serum
0.15-25
ng/mL
3.18
0.5-79.5
nmol/L
Prolactin
Serum
3.8-23.2
µg/L
43.478
165-1010
pmol/L
Proline
Plasma
1.2-3.9
mg/dL
86.858
104-340
µmol/L
Propoxyphene
Plasma
0.1-0.4
µg/mL
2.946
0.3-1.2
µmol/L
Propranolol
Serum
50-100
ng/mL
3.856
193-386
nmol/L
Prostate-specific antigen
Serum
<4.0
ng/mL
1
<4.0
µg/L
Protein (total)
Serum
6.0-8.0
g/dL
10
60-80
g/L
Prothrombin time (PT)
Plasma
10-13
s
1
10-13
s
Protoporphyrin
Red blood cells
15-50
µg/dL
0.0178
0.27-0.89
µmol/L
Protriptyline
Serum, plasma
70-250
µg/dL
3.787
266-950
nmol/L
Pyruvate
Plasma
0.5-1.5
mg/dL
113.56
60-170
µmol/L
Quinidine
Serum
2.0-5.0
µg/mL
3.082
6.2-15.4
µmol/L
Red blood cell count
Whole blood
3.9-5.5
×106 /µL
1
3.9-5.5
×1012 /L
Renin
Plasma
30-40
pg/mL
0.0237
0.7-1.0
pmol/L
Reticulocyte count
Whole blood
25-75
×103 /µL
1
25-75
×109 /L
Reticulocyte count
Whole blood
0.5-1.5
% of red blood cells
0.01
0.005-0.015
Proportion of red blood cells
Rifampin
Serum
4-40
mg/L
1.215
5-49
µmol/L
Salicylates
Serum, plasma
150-300
µg/mL
7.24
1086-2172
µmol/L
Selenium
Serum, plasma
58-234
µg/L
0.0127
0.74-2.97
µmol/L
Serine
Plasma
0.7-2.0
mg/dL
95.156
65-193
µmol/L
Serotonin (5-hydroxytryptamine)
Whole blood
50-200
ng/mL
0.00568
0.28-1.14
µmol/L
Sex hormone-binding globulin
Serum
1.5-2.0
µg/mL
8.896
13-17
nmol/L
Sodium
Serum
136-142
mEq/L
1
136-142
mmol/L
Somatomedin C (Insulinlike growth factor)
Serum
130-450
ng/mL
0.131
18-60
nmol/L
Somatostatin
Plasma
<25
pg/mL
0.611
<15
pmol/L
Streptomycin
Serum
7-50
mg/L
1.719
12-86
µmol/L
Strychnine
Whole blood
<0.5
mg/L
2.99
<1.5
µmol/L
Substance P
Plasma
<240
pg/mL
0.742
<180
pmol/L
Sulfate
Serum
10-32
mg/L
31.188
310-990
µmol/L
Sulfmethemoglobin
Whole blood
<1.0
% of total hemoglobin
0.01
<0.010
Proportion of total hemoglobin
Taurine
Plasma
0.3-2.1
mg/dL
79.91
24-168
µmol/L
Testosterone
Serum
300-1200
ng/dL
0.0347
10.4-41.6
nmol/L
Tetrahydrocannabinol
Serum
<0.20
µg/mL
3.18
<0.60
µmol/L
Theophylline
Serum, plasma
10-20
µg/mL
5.55
56-111
µmol/L
Thiopental
Serum, plasma
1-5
µg/mL
4.144
4.1-20.7
µmol/L
Thioridazine
Serum, plasma
1.0-1.5
µg/mL
2.699
2.7-4.1
µmol/L
Threonine
Plasma
0.9-2.5
mg/dL
84
75-210
µmol/L
Thrombin time
Plasma
16-24
s
1
16.24
s
Thyroglobulin
Serum
3-42
ng/mL
1
3-42
µg/L
Thyrotropin
Serum
0.4-4.2
mIU/L
1
0.4-4.2
mIU/L
Thyroxine, free (FT 4 )
Serum
0.9-2.3
ng/dL
12.871
12-30
pmol/L
Thyroxine, total (T 4 )
Serum
5.5-12.5
µg/dL
12.871
71-160
nmol/L
Thyroxine-binding globulin
Serum
16.0-24.0
µg/mL
17.094
206-309
nmol/L
Tissue plasminogen activator
Plasma
<0.04
IU/mL
1000
<40
IU/L
Tobramycin
Serum, plasma
5-10
µg/mL
2.139
10-21
µmol/L
Tocainide
Serum
4-10
µg/mL
5.201
21-52
µmol/L
Tolbutamide
Serum
80-240
µg/mL
3.7
296-888
µmol/L
Transferrin
Serum
200-400
mg/dL
0.123
2.5-5.0
µmol/L
Triglycerides
Serum
<160
mg/dL
0.0113
1.8
mmol/L
Triiodothyronine, free (FT3 )
Serum
130-450
pg/dL
0.0154
2.0-7.0
pmol/L
Triiodothyronine, total (T3 )
Serum
60-180
ng/dL
0.0154
0.92-2.76
nmol/L
Troponin I
Serum
0-0.4
ng/mL
1
0-0.4
µg/L
Troponin T
Serum
0-0.1
ng/mL
1
0-0.1
µg/L
Tryptophan
Plasma
0.5-1.5
mg/dL
48.967
25-73
µmol/L
Tyrosine
Plasma
0.4-1.6
mg/dL
55.19
20-90
µmol/L
Urea nitrogen
Serum
8-23
mg/dL
0.357
2.9-8.2
mmol/L
Uric acid
Serum
4.0-8.0
mg/dL
59.485
240-480
µmol/L
Urobilinogen
Urine
1-3.5
mg/24 h
1.7
1.7-5.9
µmol/d
Valine
Plasma
1.7-3.7
mg/dL
85.361
145-315
µmol/L
Valproic acid
Serum, plasma
50-100
µg/mL
6.934
346-693
µmol/L
Vancomycin
Serum, plasma
20-40
µg/mL
0.69
14-28
µmol/L
Vanillylmandelic acid (VMA)
Urine
2.1-7.6
mg/24 h
5.046
11-38
µmol/d
Vasoactive intestinal polypeptide
Plasma
<50
pg/mL
0.296
<15
pmol/L
Vasopressin
Plasma
1.5-2.0
pg/mL
0.923
1.0-2.0
pmol/L
Verapamil
Serum, Plasma
100-500
ng/mL
2.2
220-1100
nmol/L
Vitamin A (retinol)
Serum
30-80
µg/dL
0.0349
1.05-2.80
µmol/L
Vitamin B1 (thiamine)
Serum
0-2
µg/dL
29.6
0-75
nmol/L
Vitamin B2 (riboflavin)
Serum
4-24
µg/dL
26.6
106-638
nmol/L
Vitamin B3
Whole blood
0.2-1.8
µg/mL
4.56
0.9-8.2
µmol/L
Vitamin B6 (pyridoxine)
Plasma
5-30
ng/mL
4.046
20-121
nmol/L
Vitamin B12
Serum
160-950
pg/mL
0.7378
118-701
pmol/L
Vitamin C (ascorbic acid)
Serum
0.4-1.5
mg/dL
56.78
23-85
µmol/L
Vitamin D (1,25 dihydroxyvitamin D)
Serum
25-45
pg/mL
2.6
60-108
pmol/L
Vitamin D (25-hydroxyvitamin D)
Plasma
14-60
ng/mL
2.496
35-150
nmol/L
Vitamin E (α-tocopherol)
Serum
5-18
µg/mL
2.32
12-42
µmol/L
Vitamin K
Serum
0.13-1.19
ng/mL
2.22
0.29-2.64
nmol/L
Warfarin
Serum, plasma
1.0-10
µg/mL
3.247
3.2-32.4
µmol/L
White blood cell count
Whole blood
4500-11000
/µL
0.001
4.5-11.0
×109 /L
Differential count
Neutrophils-segmented
Whole blood
1800-7800
/µL
0.001
1.8-7.8
×109 /L
Neutrophils-bands
Whole blood
0-700
/µL
0.001
0-0.70
×109 /L
Lymphocytes
Whole blood
1000-4800
/µL
0.001
1.0-4.8
×109 /L
Monocytes
Whole blood
0-800
/µL
0.001
0-0.80
×109 /L
Eosinophils
Whole blood
0-450
/µL
0.001
0-0.45
×109 /L
Basophils
Whole blood
0-200
/µL
0.001
0-0.20
×109 /L
Differential count (number fraction)
Neutrophils-segmented
Whole blood
56
%
0.01
0.56
Proportion of 1.0
Neutrophils-bands
Whole blood
3
%
0.01
0.03
Proportion of 1.0
Lymphocytes
Whole blood
34
%
0.01
0.34
Proportion of 1.0
Monocytes
Whole blood
4
%
0.01
0.04
Proportion of 1.0
Eosinophils
Whole blood
2.7
%
0.01
0.027
Proportion of 1.0
Basophils
Whole blood
0.3
%
0.01
0.003
Proportion of 1.0
Zidovudine
Serum, plasma
0.15-0.27
µg/mL
3.7
0.56-1.01
µmol/L
Zinc
Serum
75-120
µg/dL
0.153
11.5-18.5
µmol/L