International System of Units (SI) Conversion
Use the following information to convert conventional units of measure to SI units when you review laboratory test results.
The conversion factor (CF) is used as follows:
- conventional unit × CF = SI unit
- SI unit ÷ CF = conventional unit
| Analyte | Reported Unit | Conversion Factor | SI Unit |
|---|---|---|---|
| 25HDN – 25-Hydroxyvitamin D2 and D3, Serum | |||
| 25-Hydroxy D2 | ng/mL | 2.423 | nmol/L |
| 25-Hydroxy D3 | ng/mL | 2.496 | nmol/L |
| 25-Hydroxy D Total | ng/mL | 2.496 | nmol/L |
| 3MT – 3-Methoxytyramine, 24 Hour, Urine | |||
| 3-Methoxytyramine, U | mcg/24 h | 5.981 | nmol/day |
| ACE – Angiotensin Converting Enzyme, Serum | |||
| Angiotensin Converting Enzyme, S | U/L | 0.017 | mcKat/L |
| ACTH – Adrenocorticotropic Hormone (ACTH), Plasma | |||
| Adrenocorticotropic Hormone, P | pg/mL | 0.22 | pmol/L |
| AL – Aluminum, Serum | |||
| Aluminum, S | ng/mL | 0.0371 | mcmol/L |
| ALB – Albumin, Serum | |||
| Albumin, S | g/dL | 10 | g/L |
| ALDS – Aldosterone, Serum | |||
| Aldosterone, S | ng/dL | 0.0277 | nmol/L |
| ALDU – Aldosterone, 24 Hour, Urine | |||
| Aldosterone, U | mcg/24 h | 2.774 | nmol/day |
| ANST – Androstenedione, Serum | |||
| Androstenedione, S | ng/dL | 0.0349 | nmol/L |
| CA – Calcium, Total, Serum | |||
| Calcium, Total, S | mg/dL | 0.25 | mmol/L |
| CAI – Calcium, Ionized, Serum | |||
| Calcium, Ionized, S | mg/dL | 0.25 | mmol/L |
| CATN – Calcitonin, Serum | |||
| Calcitonin, S | pg/mL | 1 | ng/L |
| CARU – Cyclic Adenosine Monophosphate (cAMP), Urinary Excretion, Serum and Urine | |||
| Cyclic Adenosine Monophosphate (cAMP), Urinary Excretion, Serum and Urine | nmol/dL | 10 | nmol/L |
| CATP – Catecholamine Fractionation, Free, Plasma | |||
| Norepinephrine | pg/mL | 5.911 | pmol/L |
| Epinephrine | pg/mL | 5.458 | pmol/L |
| Dopamine | pg/mL | 6.528 | pmol/L |
| CATU – Catecholamine Fractionation, Free, 24 Hour, Urine | |||
| Norepinephrine | mcg/24 h | 5.911 | nmol/day |
| Epinephrine | mcg/24 h | 5.458 | nmol/day |
| Dopamine | mcg/24 h | 6.528 | nmol/day |
| COCOU – Cortisol/Cortisone, Free, 24 Hour, Urine | |||
| Cortisol, U | mcg/24 h | 2.76 | nmol/day |
| CORT – Cortisol, Serum | |||
| Cortisol, S | mcg/dL | 27.6 | nmol/L |
| AM Result | mcg/dL | 27.6 | nmol/L |
| PM Result | mcg/dL | 27.6 | nmol/L |
| CORTU – Cortisol, Free, 24 Hour, Urine | |||
| Cortisol, U | mcg/24 h | 2.759 | nmol/day |
| CTU – Creatinine, 24 Hour, Urine | |||
| Creatinine, U | mg/24 h | 0.00884 | mmol/day |
| Creatinine Conc | mg/dL | 0.0884 | mmol/L |
| DCORT – 11-Deoxycortisol, Serum | |||
| 11-Deoxycortisol, S | ng/dL | 0.0289 | nmol/L |
| DHEA_ – Dehydroepiandrosterone (DHEA), Serum | |||
| Dehydroepiandrosterone, S | ng/mL | 3.467 | nmol/L |
| DHES1 – Dehydroepiandrosterone Sulfate, Serum | |||
| Dehydroepiandrosterone Sulfate, S | mcg/dL | 0.027 | mcmol/L |
| DHVD – 1,25-Dihydroxyvitamin D, Serum | |||
| 1,25-Dihydroxyvitamin D, S | pg/mL | 2.400 | pmol/L |
| E1 – Estrone, Serum | |||
| Estrone, S | pg/mL | 3.699 | pmol/L |
| EEST – Estradiol, Serum | |||
| Estradiol, Mass Spectrometry, S | pg/mL | 3.671 | pmol/L |
| FRT4 – T4 (Thyroxine), Free, Serum | |||
| T4 (Thyroxine), Free, S | ng/dL | 12.87 | pmol/L |
| FRTUP – Free Thyroxine Index (FTI), Serum | |||
| Free Thyroxine Index | mcg/dL | 12.87 | nmol/L |
| GAST – Gastrin, Serum | |||
| Gastrin, S | pg/mL | 1 | ng/L |
| GLP – Glucagon, Plasma | |||
| Glucagon, P | pg/mL | 1 | ng/L |
| GLSF – Glucose, Spinal Fluid | |||
| Glucose, CSF | mg/dL | 0.05551 | mmol/L |
| HGH – Growth Hormone, Serum | |||
| Growth Hormone, S | ng/mL | 1 | mcg/L |
| INS – Insulin, Serum | |||
| Insulin, S | mcIU/mL | 6.95 | pmol/L |
| LIVPR – Liver Profile, Serum | |||
| Albumin, S | g/dL | 10 | g/L |
| METAF – Metanephrines, Fractionated, 24 Hour, Urine | |||
| Metanephrine, U | mcg/24 h | 5.070 | nmol/day |
| Normetanephrine, U | mcg/24 h | 5.458 | nmol/day |
| Total Metanephrines, U | mcg/24 h | 5.264 | nmol/day |
| PGSN – Progesterone, Serum | |||
| Progesterone, S | ng/mL | 3.18 | nmol/L |
| PRL – Prolactin, Serum | |||
| Prolactin, S | ng/mL | 1 | mcg/L |
| SERWB – Serotonin, Blood | |||
| Serotonin, B | ng/mL | 5.675 | nmol/L |
| T3 – T3 (Triiodothyronine), Total, Serum | |||
| T3 (Triiodothyronine), Total, S | ng/dL | 0.0154 | nmol/L |
| T3FR – T3 (Triiodothyronine), Free, Serum | |||
| T3 (Triiodothyronine), Free, Serum | pg/mL | 1.54 | pmol/L |
| T4 – T4 (Thyroxine), Total Only, Serum | |||
| T4 (Thyroxine), Total Only, S | mcg/dL | 12.87 | nmol/L |
| TBGI – Thyroxine-Binding Globulin (TBG), Serum | |||
| Thyroxine Binding Globulin, S | mcg/mL | 1 | mg/L |
| TGRP – Testosterone, Total and Free, Serum | |||
| Testosterone, Free, S | ng/dL | 34.672 | pmol/L |
| TRIG1 – Triglycerides, Serum | |||
| Triglycerides, S | mg/dL | 0.0113 | mmol/L |
| TTST – Testosterone, Total by Mass Spectrometry, Serum | |||
| Testosterone, Total, S | ng/dL | 0.0347 | nmol/L |
| UE3 – Estriol, Unconjugated, Serum | |||
| Estriol, Unconjugated, S | ng/mL | 3.47 | nmol/L |
| UOSMS – Osmolality, Serum | |||
| Osmolality, S | mOsm/kg | 1 | mmol/kg |