SI Unit Conversion Table for Lab Results | Labcorp

SI Unit Conversion Table

Analyte Conventional Units Conventional to SI (multiply by) SI Units SI to Conventional (multiply by)
NA = not applicable.
AU = arbitrary unit.
Acetaminophen (Datril®, Tylenol®), serum μg/mL 6.62 μmol/L 0.151
Acid phosphatase units/L NA units/L NA
Adrenocorticotropic hormone (ACTH) pg/mL 1 ng/L 1
Alanine aminotransferase (ALT) units/L NA units/L NA
Albumin, serum g/dL 10 g/L 0.10
Aldolase, serum units/L NA units/L NA
Aldosterone
serum ng/dL 0.0277 nmol/L 36.10
urine μg/24 h 2.77 nmol/d 0.361
Alkaline phosphatase units/L NA units/L NA
α1-Antitrypsin mg/dL 0.01 g/L 100
α1-Fetoprotein
amniotic fluid μg/mL 1 mg/L 1
serum ng/mL 1 μg/L 1
Aluminum, serum μg/L 0.0371 μmol/L 26.95
Amikacin, serum μg/mL 1.71 μmol/L 0.585
Aminolevulinic acid (delta), urine mg/24 h 7.626 μmol/d 0.131
Ammonia, plasma μg/dL 0.59 μmol/L 1.69
Amylase, serum units/L NA units/L NA
Androstenedione ng/dL 0.0349 nmol/L 28.7
Angiotensin-converting enzyme (ACE) units/L 1 units/L 1
Antidiuretic hormone (ADH) (vasopressin) pg/mL 1 ng/L 1
Arsenic
blood μg/L 0.0133 μmol/L 75.2
urine μg/L 0.0133 μmol/d 75.2
Aspartate aminotransferase (AST) units/L NA units/L NA
Bilirubin, serum
direct mg/dL 17.1 μmol/L 0.0585
total mg/dL 17.1 μmol/L 0.0585
Bromide, plasma μg/mL 0.0125 mmol/L 799
Cadmium
blood μg/L 8.897 nmol/L 0.112
urine μg/g creatinine 8.897 μmol/g creatinine 0.112
Caffeine, serum μg/mL 5.15 μmol/L 0.194
Calcitonin pg/mL 1 ng/L 1
Calcium
ionized mg/dL 0.25 mmol/L 4
serum mg/dL 0.25 mmol/L 4
urine mg/24 h 0.025 mmol/d 40
Carbamazepine (Tegretol®), serum μg/mL 4.23 μmol/L 0.236
Carbon dioxide mEq/L 1 mmol/L 1
Carboxyhemoglobin % NA % NA
Carcinoembryonic antigen (CEA) ng/mL 1 μg/L 1
Carotene, serum μg/dL 0.0186 μmol/L 53.8
Catecholamines, fractionation, urine μg/24 h 5.91 nmol/d 0.169
Ceruloplasmin mg/dL 10 μmol/L 0.10
Chloramphenicol, serum μg/mL 3.09 μmol/L 0.323
Chlordiazepoxide (Librium®), serum μg/mL 3.3 μmol/L 0.303
Chloride
serum mEq/L 1 mmol/L 1
urine mmol/24 h 1 mmol/d 1
Cholesterol mg/dL 0.0259 mmol/L 38.61
HDL mg/dL 0.0259 mmol/L 38.61
LDL mg/dL 0.0259 mmol/L 38.61
Cholinesterase, serum units/L 1000 kU/L 0.001
Chromium, plasma μg/L 19.2 nmol/L 0.052
Clonazepam (Klonopin™), serum ng/mL 3.17 nmol/L 0.315
Codeine, serum ng/mL 3.34 nmol/L 0.299
Complement C3 activator mg/dL 10 mg/L 0.10
Compound S (11-deoxycortisol) μg/dL 0.029 μmol/L 34.5
Copper
serum μg/L 0.0157 μmol/L 63.7
urine μg/24 h 0.0157 μmol/d 63.7
Coproporphyrins
blood μg/dL 15 nmol/L 0.067
fluid μg/g 1.5 nmol/g 0.67
urine μg/24 h 1.5 nmol/d 0.67
Cortisol
blood μg/dL 27.6 nmol/L 0.036
urine μg/24 h 2.76 nmol/d 0.362
C-Peptide, serum ng/mL 0.33 nmol/L 3.03
Creatine kinase (CK) units/L NA units/L NA
Creatinine
serum mg/dL 88.4 μmol/L 0.0113
urine mg/kg/24 h 8.84 μmol/kg/d 0.113
mg/24 h 0.0088 μmol/d 113.1
Cyanide, blood μg/mL 38.4 μmol/L 0.026
Cyclic AMP, urine μg/L 3.04 μmol/L 0.329
Cystine, urine mg/24 h 8.32 μmol/24 h 0.120
DHEA ng/dL 0.0347 nmol/L 28.8
DHEA sulfate μg/dL 0.026 μmol/L 38
Diazepam (Valium®), serum μg/mL 0.0000035 μmol/L 286
Digitoxin ng/mL 1.31 nmol/L 0.763
Digoxin (Lanoxin®) ng/mL 1.28 nmol/L 0.781
Disopyramide (Norpace®), serum μg/mL 2.95 μmol/L 0.339
Doxepin (Sinequan®), serum ng/mL 3.58 nmol/L 0.279
Erythropoietin mIU/mL 1 IU/L 1
Estradiol (E2), serum pg/mL 3.67 pmol/L 0.272
Estriol (E3), serum ng/mL 3.47 nmol/L 0.288
Estrone (E1), serum pg/mL 3.70 pmol/L 0.27
Ethanol, blood g/dL (%) 217 mmol/L 0.00461
Ethosuximide (Zarontin®), serum μg/mL 7.08 μmol/L 0.141
Ethylene glycol, serum mg/L 16.1 μmol/L 0.0621
Fecal fat g/24 h 1 g/d 1
Ferritin, serum ng/mL 1 μg/L 1
Fluoride, plasma μg/mL 52.6 μmol/L 0.019
Folate
red cell ng/mL 2.265 nmol/L 0.442
serum ng/mL 2.265 nmol/L 0.442
Follicle-stimulating hormone (FSH) mIU/mL 1 IU/L 1
γ-Glutamyl transferase (GGT) units/L NA units/L NA
Gastrin, serum pg/mL 1 ng/L 1
Gentamicin, serum μg/mL 2.09 μmol/L 0.478
Glucose
blood mg/dL 0.0555 mmol/L 18.02
CSF mg/dL 0.0555 mmol/L 18.02
urine mg/dL 0.0555 mmol/L 18.02
Glutamine, CSF μmol/dL 10 μmol/L 0.1
Glycohemoglobin % of total Hb 0.01 Fraction of total Hb 100
Gold, plasma mg/L 5.08 μmol/L 0.20
Growth hormone (GH) ng/mL 1 μg/L 1
Haloperidol (Haldol®), serum ng/mL 2.66 nmol/L 0.376
Haptoglobin, serum mg/dL 10 mg/L 0.10
Human chorionic gonadotropin (hCG), serum mIU/mL 1 IU/L 1
17-Hydroxycorticosteroids (17-OHCS), urine mg/24 h 2.76 μmol/d 0.362
5-Hydroxyindoleacetic acid (5-HIAA), urine mg/24 h 5.2 μmol/d 0.19
17-Hydroxyprogesterone ng/dL 0.0303 nmol/L 33.0
Imipramine (Tofranil®), serum ng/mL 3.57 nmol/L 0.280
Insulin, blood μIU/mL 1 mIU/L 1
Iron μg/dL 0.179 μmol/L 5.587
Iron-binding capacity, total (TIBC) μg/dL 0.179 μmol/L 5.587
Isopropanol, blood g/dL (%) 16.6 mmol/L 0.06
17-Ketogenic steroids, urine mg/24 h 3.467 μmol/d 0.288
17-Ketosteroids mg/24 h 3.467 μmol/d 0.288
Lactate dehydrogenase (LD) units/L NA units/L NA
Lactic acid
blood mg/dL 0.111 mmol/L 9.01
CSF mg/dL 0.111 mmol/L 9.01
Lead
blood μg/dL 0.0483 μmol/L 20.70
urine μg/24 h 0.00483 μmol/d 207.04
Lidocaine (Xylocaine®), serum μg/mL 4.27 μmol/L 0.234
Lipase, serum units/L NA units/L NA
Lipids, total mg/dL 0.01 g/L 100
Lithium, serum mEq/L 1 mmol/L 1
Lorazepam, serum ng/mL 3.11 nmol/L 0.321
Luteinizing hormone (LH) mIU/mL 1 IU/L 1
Lysergic acid diethylamide (LSD) ng/mL 0.0031 μmol/L 323
Magnesium
serum mg/dL 0.4114 mmol/L 2.43
urine mg/24 h 0.0411 mmol/d 24.31
Manganese
plasma μg/L 18.2 nmol/L 0.055
urine μg/L 18.2 nmol/L 0.055
Meperidine (Demerol®), serum ng/mL 4.04 nmol/L 0.248
Mercury
blood μg/L 0.005 μmol/L 200
urine μg/L 0.005 μmol/d 200
Metanephrines, urine μg/24 h 5.07 nmol/d 0.197
Methadone, serum ng/mL 0.00323 μmol/L 310
Methanol, blood g/dL (%) 312 mmol/L 0.0032
Methsuximide (Celontin®), serum μg/mL 5.29 μmol/L 0.189
Myoglobin, serum ng/mL 1 μg/L 1
N-Acetylprocainamide (NAPA), serum μg/mL 3.61 μmol/L 0.277
Nortriptyline (Aventyl®), serum ng/mL 3.80 nmol/L 0.263
5± Nucleotidase units/L NA units/L NA
Osmolality
serum mOsm/kg NA mmol/kg NA
urine mOsm/kg NA mmol/kg NA
Oxalate, urine mg/24 h 11.4 μmol/d 0.088
Parathyroid hormone, intact pg/mL 1 ng/L 1
Pentobarbital (Nembutal®), serum μg/mL 4.42 μmol/L 0.226
Phencyclidine (PCP), serum or urine ng/mL 4.11 nmol/L 0.243
Phenobarbital, serum μg/mL 4.31 μmol/L 0.232
Phenylalanine, blood μmol/dL 10 μmol/L 0.1
Phenytoin (Dilantin®)
free μg/mL 3.96 μmol/L 0.253
serum μg/mL 3.96 μmol/L 0.253
total μg/mL 3.96 μmol/L 0.253
Phospholipids, serum mg/dL 0.01 g/L 100
Phosphorus
serum mg/dL 0.323 mmol/L 3.10
urine g/24 h 32.3 mmol/d 0.031
Porphobilinogen (PBG), urine mg/24 h 4.42 μmol/d 0.226
Potassium
blood mEq/L 1 mmol/L 1
urine mEq/24 h 1 mmol/d 1
Pregnanediol, urine mg/24 h 3.12 μmol/24 h 0.321
Pregnanetriol, urine mg/24 h 2.97 μmol/24 h 0.337
Primidone (Mysoline®), serum μg/mL 4.58 μmol/L 0.218
Procainamide (Pronestyl®), serum μg/mL 4.23 μmol/L 0.236
Progesterone ng/mL 3.18 nmol/L 0.314
Prolactin ng/mL 1 μg/L 1
Propoxyphene (Darvon®), serum or urine ng/mL 0.003 μmol/L 339
Propranolol (Inderal®), serum ng/mL 3.86 nmol/L 0.259
Protein
CSF mg/dL 10 mg/L 0.10
serum g/dL 10 g/L 0.10
urine mg/24 h 0.001 g/d 1000
Protoporphyrin, free erythrocyte (FEP) μg/dL 0.0178 μmol/L 56.18
Protoporphyrin, zinc (ZPP) μg/dL 0.016 μmol/L 62.5
Quinidine, serum μg/mL 3.08 μmol/L 0.325
Salicylate, serum μg/mL 0.00724 mmol/L 138.1
Secobarbital (Seconal™), serum μg/mL 4.20 μmol/L 0.238
Serotonin ng/mL 0.00568 μmol/L 176
Sodium
blood mEq/L 1 mmol/L 1
urine mEq/24 h 1 mmol/d 1
T3 uptake (T3U) % 1 AU* 1
Testosterone ng/dL 0.0347 nmol/L 28.8
Theophylline, serum μg/mL 5.55 μmol/L 0.18
Thiocyanate, serum mg/dL 172 μmol/L 0.0058
Thyroglobulin ng/mL 1 μg/L 1
Thyroid-stimulating hormone (TSH) μIU/mL 1 mIU/L 1
Thyroxine-binding globulin (TBG) μg/mL 1 mg/L 1
Thyroxine (T4) μg/dL 12.9 nmol/L 0.0775
Thyroxine, free (FT4) ng/dL 12.9 pmol/L 0.0775
Tobramycin, serum μg/mL 2.14 μmol/L 0.467
Transferrin mg/dL 0.01 g/L 100
Triglycerides mg/dL 0.0113 mmol/L 88.5
Triiodothyronine (T3) ng/dL 0.0154 nmol/L 64.9
Urea nitrogen, blood (BUN) mg/dL 0.357 mmol/L 2.80
Uric acid
serum mg/dL 0.059 mmol/L 16.9
urine mg/24 h 0.0059 mmol/d 169
Valproic acid (Depakene®), serum μg/mL 6.93 μmol/L 0.144
Vancomycin, serum μg/mL 0.690 μmol/L 1.45
Vanillylmandelic acid (VMA), urine mg/24 h 5.05 μmol/d 0.198
Vitamin
A μg/dL 0.0349 μmol/L 28.65
B6 ng/mL 4.046 nmol/L 0.247
B12 ng/mL 738 pmol/L 0.001355
C mg/dL 56.78 μmol/L 0.018
D3 (calcitriol, 1,25-dihydroxy) pg/mL 2.4 pmol/L 0.417
E mg/L 2.322 μmol/L 0.43
Warfarin (Coumadin®), serum μg/mL 3.24 μmol/L 0.308
Xylose, plasma mg/dL 0.0667 mmol/L 15.0
Zinc
serum μg/dL 0.153 μmol/L 6.54
urine μg/24 h 0.0153 μmol/d 65.36