## SI Units 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.

+------------------------------+------------+------------+------------+
| **Component**\               | **Conven-  | **Conver-  | **SI       |
|                              | tional**   | sion\      | Unit**     |
|                              |            | Factor**   |            |
|                              | **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 amino- transferase   | units/L    | 1.0        | U/L        |
| (ALT)                        |            |            |            |
+------------------------------+------------+------------+------------+
| 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        |
+------------------------------+------------+------------+------------+
| Aminobutyric acid            | mg/dL      | 97         | µmol/L     |
+------------------------------+------------+------------+------------+
| Amitriptyline                | ng/mL      | 3.61       | nmol/L     |
+------------------------------+------------+------------+------------+
| Ammonia (as NH~3~)           | 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     |
+------------------------------+------------+------------+------------+
| Antidiuretic hormone         | pg/mL      | 0.923      | pmol/L     |
+------------------------------+------------+------------+------------+
| Antithrombin III             | mg/dL      | 10         | mg/L       |
+------------------------------+------------+------------+------------+
| alpha~1~-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 amino- transferase | units/L    | 1.0        | U/L        |
| (AST)                        |            |            |            |
+------------------------------+------------+------------+------------+
| Bicarbonate                  | mEq/L      | 1.0        | mmol/L     |
+------------------------------+------------+------------+------------+
| Bilirubin                    | mg/dL      | 17.1       | µmol/L     |
+------------------------------+------------+------------+------------+
| Bromide                      | mg/dL      | 0.125      | mmol/L     |
+------------------------------+------------+------------+------------+
| C-peptide                    | ng/mL      | 0.333      | nmol/L     |
+------------------------------+------------+------------+------------+
| Calcitonin                   | pg/mL      | 1.0        | ng/L       |
+------------------------------+------------+------------+------------+
| Calcium                      | mg/dL      | 0.25       | mmol/L     |
+------------------------------+------------+------------+------------+
|  Calcium                     | mEq/L      | 0.50       | mmol/L     |
+------------------------------+------------+------------+------------+
| Carboxyhemoglobin            | \% of\     | 0.01       | Propor-    |
|                              | hemo-      |            |            |
|                              | globin     |            | tion of\   |
|                              | saturation |            | hemo-      |
|                              |            |            | globin     |
|                              |            |            | saturation |
+------------------------------+------------+------------+------------+
| Carotene                     | µg/dL      | 0.0186     | µmol/L     |
+------------------------------+------------+------------+------------+
| Ceruloplasmin                | mg/dL      | 10         | mg/L       |
+------------------------------+------------+------------+------------+
| Cholesterol                  | mg/dL      | 0.0259     | mmol/L     |
+------------------------------+------------+------------+------------+
| Citrate                      | mg/dL      | 52.05      | µmol/L     |
+------------------------------+------------+------------+------------+
| Copper                       | µg/dL      | 0.157      | µmoI/L     |
+------------------------------+------------+------------+------------+
| Corticotropin (ACTH)         | pg/mL      | 0.22       | pmol/L     |
+------------------------------+------------+------------+------------+
| Cortisol                     | µg/dL      | 27.59      | 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       | ng/mL      | 3.47       | nmol/L     |
| (DHEA)                       |            |            |            |
+------------------------------+------------+------------+------------+
| 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     |
+------------------------------+------------+------------+------------+
| Estradiol                    | pg/mL      | 3.671      | pmol/L     |
+------------------------------+------------+------------+------------+
| Estriol                      | ng/mL      | 3.467      | nmol/L     |
+------------------------------+------------+------------+------------+
| Estrone                      | ng/dL      | 37         | pmoI/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         | mIU/mL     | 1.0        | IU/L       |
| hormone-FSH                  |            |            |            |
+------------------------------+------------+------------+------------+
| 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   | units/L    | 1.0        | U/L        |
| (GGT)                        |            |            |            |
+------------------------------+------------+------------+------------+
| Glycated hemoglobin          | \% of      | 0.01       | Proportion |
| (glycosylated\               | total\     |            | of total\  |
| hemoglobin A~1~, A~1C~)      | hemo-      |            | hemo-      |
|                              | globin     |            | globin     |
+------------------------------+------------+------------+------------+
| Glycerol (free)              | mg/dL      | 108.59     | µmol/L     |
+------------------------------+------------+------------+------------+
| Glycine                      | mg/dL      | 133.3      | µmol/L     |
+------------------------------+------------+------------+------------+
| Haptoglobin                  | mg/dL      | 0.10       | µmol/L     |
+------------------------------+------------+------------+------------+
| High-density lipoprotein     | mg/dL      | 0.0259     | mmol/L     |
| cholesterol (HDL-C)          |            |            |            |
+------------------------------+------------+------------+------------+
| Histidine                    | mg/dL      | 64.45      | µmol/L     |
+------------------------------+------------+------------+------------+
| Homocysteine (total)         | mg/L       | 7.397      | µmol/L     |
+------------------------------+------------+------------+------------+
| Human chorionic gonadotropin | mlU/mL     | 1.0        | IU/L       |
| (HCG)                        |            |            |            |
+------------------------------+------------+------------+------------+
| Hydroxybutyric acid          | mg/dL      | 96.05      | µmol/L     |
+------------------------------+------------+------------+------------+
| Hydroxyproline               | mg/dL      | 76.3       | µmol/L     |
+------------------------------+------------+------------+------------+
| Insulin                      | µIU/mL     | 6.945      | pmol/L     |
+------------------------------+------------+------------+------------+
| Iron, total or TIBC          | 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\       | \%         | 0.01       | Proportion |
| isoenzymes (LD~1~-LD~5~)     |            |            | 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\     | mg/dL      | 0.0259     | mmol/L     |
| cholesterol (LDL-C)          |            |            |            |
+------------------------------+------------+------------+------------+
| Luteinizing hormone (LH,     | IU/L       | 1.0        | lU/L       |
| leutropin)                   |            |            |            |
+------------------------------+------------+------------+------------+
| Lysine                       | mg/dL      | 68.5       | µmol/L     |
+------------------------------+------------+------------+------------+
| Magnesium                    | mg/dL      | 0.411      | mmol/L     |
+------------------------------+------------+------------+------------+
|  Magnesium                   | mEq/L      | 0.50       | mmol/L     |
+------------------------------+------------+------------+------------+
| Manganese                    | ng/mL      | 18.2       | nmol/L     |
+------------------------------+------------+------------+------------+
| Methanol                     | mg/L       | 0.0312     | mmol/L     |
+------------------------------+------------+------------+------------+
| Methemoglobin                | \% of      | 0.01       | Proportion |
|                              | total\     |            | of total\  |
|                              | hemoglobin |            | hemoglobin |
+------------------------------+------------+------------+------------+
| Methionine                   | mg/dL      | 67.02      | µmol/L     |
+------------------------------+------------+------------+------------+
| Myoglobin                    | µg/L       | 0.0571     | nmol/L     |
+------------------------------+------------+------------+------------+
| Nicotine                     | mg/L       | 6.164      | µmol/L     |
+------------------------------+------------+------------+------------+
| Norepinephrine               | pg/mL      | 0.00591    | nmol/L     |
+------------------------------+------------+------------+------------+
| Ornithine                    | mg/dL      | 75.67      | µmol/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       | µmoI/L     |
+------------------------------+------------+------------+------------+
| Phosphorus                   | mg/dL      | 0.323      | mmol/L     |
+------------------------------+------------+------------+------------+
| Plasminogen                  | mg/dL      | 0.113      | µmol/L     |
+------------------------------+------------+------------+------------+
| Plasminogen activator        | mIU/mL     | 1.0        | IU/L       |
| inhibitor                    |            |            |            |
+------------------------------+------------+------------+------------+
| 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     |
+------------------------------+------------+------------+------------+
| Protoporphyrin, erythrocyte  | µg/dL      | 0.01777    | µmol/L     |
+------------------------------+------------+------------+------------+
| Pyruvate                     | mg/dL      | 113.6      | µmoI/L     |
+------------------------------+------------+------------+------------+
| Quinidine                    | µg/mL      | 3.08       | µmol/L     |
+------------------------------+------------+------------+------------+
| Renin                        | pg/mL      | 0.0237     | pmol/L     |
+------------------------------+------------+------------+------------+
| Salicylate                   | mg/L       | 0.00724    | mmol/L     |
+------------------------------+------------+------------+------------+
| Serotonin                    | ng/mL      | 0.00568    | µmol/L     |
| (5-hydroxytryptamine)        |            |            |            |
+------------------------------+------------+------------+------------+
| 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                  | mIU/L      | 1.0        | mIU/L      |
| (thyroid-stimulating\        |            |            |            |
| hormone, TSH)                |            |            |            |
+------------------------------+------------+------------+------------+
| Thyroxine, free (T~4~)       | ng/dL      | 12.87      | pmol/L     |
+------------------------------+------------+------------+------------+
| Thyroxine, total (T~4~)      | µg/dL      | 12.87      | nmol/L     |
+------------------------------+------------+------------+------------+
| Transferrin                  | mg/dL      | 0.01       | g/L        |
+------------------------------+------------+------------+------------+
| Triglycerides                | mg/dL      | 0.0113     | mmol/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\       | pg/mL      | 1.0        | ng/L       |
| polypeptide                  |            |            |            |
+------------------------------+------------+------------+------------+
| Vitamin A (retinol)          | µg/dL      | 0.0349     | µmoI/L     |
+------------------------------+------------+------------+------------+
| Vitamin B~6~ (pyridoxine)    | ng/mL      | 4.046      | nmol/L     |
+------------------------------+------------+------------+------------+
| Vitamin B~12~                | pg/mL      | 0.738      | pmol/L     |
| (cyanocobalamin)             |            |            |            |
+------------------------------+------------+------------+------------+
| Vitamin C (ascorbic acid)    | mg/dL      | 56.78      | µmol/L     |
+------------------------------+------------+------------+------------+
| Vitamin D                    |            |            |            |
+------------------------------+------------+------------+------------+
|     1,25-Dihydroxy-          | pg/mL      | 2.6        | pmol/L     |
|                              |            |            |            |
| vitamin D                    |            |            |            |
+------------------------------+------------+------------+------------+
|     25-Hydroxy-              | ng/mL      | 2.496      | nmol/L     |
|                              |            |            |            |
| vitamin D                    |            |            |            |
+------------------------------+------------+------------+------------+
| Vitamin E                    | mg/dL      | 23.22      | µmoI/L     |
+------------------------------+------------+------------+------------+
| Vitamin K                    | ng/mL      | 2.22       | nmol/L     |
+------------------------------+------------+------------+------------+
| Zinc                         | µg/dL      | 0.153      | µmoI/L     |
+------------------------------+------------+------------+------------+

##