Results of chemistry tests performed on serum, plasma, whole blood or erythrocytes can be converted between conventional (US) and SI units if the conversion factors are known.
Specimen: serum (S), plasma (P), whole blood (WB) or erythrocytes (RBCs)
Test, Method |
Speci-men |
Conventional Units |
Factor for Conversion |
SIU Units |
---|---|---|---|---|
11-Deoxycorticosterone (DOC) |
S |
pg/mL |
3.03 |
pmol/L |
Acetone |
S |
mg/dL |
172.95 |
µmol/L |
Acid phosphatase, prostatic |
S |
U/L |
1 |
U/L (nKat/L) |
Acid phosphatase, prostatic, Bessey-Lowry-Brock |
S |
Bessey-Lowry-Brock units per L at 37°C |
16.67 |
U/L at 37° C (nkat/L) |
Adrenocorticotropic hormone (ACTH) |
S |
pg/mL |
1 |
ng/L |
Adrenocorticotropic hormone ACTH) |
S |
pg/mL |
0.2202 |
pmol/L |
Alanine amino-transferase (ALT, SGPT) |
S |
U/L at 37° C |
1 |
U/L at 37° C |
Alanine amino-transferase (ALT, SGPT) |
S |
U/L at 37° C |
0.017 |
µKat/L |
Albumin |
S |
g/dL |
10 |
g/L |
Aldolase, Sibley-Lehninger |
S |
U/L at 37° C |
0.74 |
U/L at 37° C |
Aldolase |
S |
U/L |
0.017 |
µKat/L |
Aldosterone |
S |
ng/dL |
0.0277 |
nmol/L |
Alkaline phosphatase, King-Armstrong |
S |
King Armstrong units/dL |
7.1 |
U/L |
Alkaline phosphatase |
S |
U/L |
0.017 |
µKat/L |
Alkaline phosphatase, Babson |
S |
Babson units per L at 37°C |
1 |
U/L at 37° C |
alpha-1 Antitrypsin |
S |
mg/dL |
0.01 |
g/L |
alpha-Fetoprotein (AFP) |
S |
ng/mL |
1 |
µg/L |
alpha-Fetoprotein (AFP) |
S |
ng/dL |
10 |
ng/L |
alpha-Fetoprotein (AFP) |
S |
mg/dL |
0.01 |
g/L |
alpha-Fetoprotein (AFP) |
S |
mg/dL |
10 |
mg/L |
alpha-Fetoprotein (AFP) |
S |
µg/dL |
10 |
µg/L |
Ammonia |
P |
µg NH3/dL |
0.5872 |
µmol NH3/L |
Ammonia |
P |
µg N/dL |
0.714 |
µmol N/L |
Amylase, Somogyi (saccharogenic) |
S |
U/dL |
1.85 |
U/L |
Amylase |
S |
U/L |
0.017 |
µKat/L |
Androstenedione |
S |
ng/dL |
34.92 |
pmol/L |
Angiotensin converting enzyme (ACE) |
S |
nmol/min/mL |
1 |
U/L |
Angiotensin II |
S |
ng/dL |
10 |
ng/L |
Anion gap |
S |
mEq/L |
1 |
mmol/L |
Antidiuretic hormone (ADH) |
S |
pg/mL |
1 |
ng/L |
Apolipoprotein A1 |
S |
mg/dL |
10 |
mg/L |
Apolipoprotein B |
S |
mg/dL |
10 |
mg/L |
Aspartate amino-transferase (AST, SGOT) |
S |
U/L at 37° C |
1 |
U/L at 37° C |
Aspartate amino-transferase (AST, SGOT) |
S |
U/L at 37° C |
0.017 |
µKat/L |
Base Excess |
S |
mEq/L |
1 |
mmol/L |
Bicarbonate |
S |
mEq/L |
1 |
mmol/L |
Bilirubin |
S |
mg/dL |
17.1 |
µmol/L |
Calcitonin |
S |
pg/mL |
1 |
ng/L |
Calcium |
S |
mg/dL |
0.25 |
mmol/L |
Calcium |
S |
mEq/L |
0.5 |
mmol/L |
Calcium, ionized |
S |
mg/dL |
0.25 |
mmol/L |
Carbon dioxide partial pressure pCO2 |
WB |
mm Hg |
0.133 |
kPa |
Carbon dioxide total |
S |
mEq/L |
1 |
mmol/L |
Carcinoembryonic Antigen (CEA) |
S |
ng/mL |
1 |
µg/L |
Carcinoembryonic Antigen (CEA) |
S |
µg/mL |
1 |
mg/L |
Carotene |
S |
µg/dL |
0.0186 |
µmol/L |
Catecholamines, fractionated - epinephrine |
P |
pg/mL |
5.458 |
pmol/L |
Catecholamines, fractionated - norepinephrine |
P |
pg/mL |
0.0059 |
nmol/L |
Ceruloplasmin |
S |
mg/dL |
10 |
mg/L |
Chloride |
S |
mEq/L |
1 |
mmol/L |
Chloride |
S |
mg/dL |
0.282 |
mmol/L |
Cholesterol |
S |
mg/dL |
0.0259 |
mmol/L |
Cholinesterase (pseudocholinesterase) |
S |
U/L at 37° C |
1 |
U/L at 37° C |
Copper |
S |
µg/dL |
0.157 |
µmol/L |
Coproporphyrins |
S |
µg/dL |
15 |
nmol/L |
Cortisol |
S |
µg/dL |
0.028 |
µmol/L |
Cortisol |
S |
ng/mL |
2.76 |
nmol/L |
Creatine |
S |
mg/dL |
76.3 |
µmol/L |
Creatine kinase |
S |
U/L at 37° C |
1 |
U/L at 37° C |
Creatine kinase |
S |
U/L at 37° C |
0.017 |
µKat/L |
Creatinine |
S |
mg/dL |
88.4 |
µmol/L |
Creatinine clearance |
S |
mL/min/1.73 m^2 |
0.0096 |
mL/sec•m^2 |
cyclic Adenosine monophosphate (cAMP) |
S |
µg/L |
3.04 |
nmol/L |
cyclic Adenosine monophosphate (cAMP) |
WB |
ng/mL |
3.04 |
nmol/L |
Dehydroepiandrosterone sulfate (DHEA-S) |
S |
µg/mL |
2.6 |
µmol/L |
delta-Aminolevulinic acid |
S |
mg/dL |
76.26 |
µmol/L |
Ferritin |
S |
ng/mL |
1 |
µg/L |
Folate |
S |
ng/mL |
2.266 |
nmol/L |
Galactose |
WB |
mg/dL |
0.05551 |
mmol/L |
Gamma glutamyl transferease (GGT) |
S |
U/L at 37° C |
1 |
U/L at 37° C |
Gamma glutamyl transferease (GGT) |
S |
U/L at 37° C |
0.017 |
µKat/L |
Gastrin |
S |
pg/mL |
1 |
ng/L |
Glucose |
S |
mg/dL |
0.0555 |
mmol/L |
Glutathione |
WB |
mg/dL |
0.0325 |
mmol/L |
Growth hormone |
S |
ng/mL |
1 |
µg/L |
Haptoglobin |
S |
mg/dL |
0.01 |
g/L |
HDL-cholesterol |
S |
mg/dL |
0.0259 |
mmol/L |
Human chorionic gonadotropin (HCG), beta-subunit |
S |
mU/mL |
1 |
IU/L |
Hydroxybutyric dehydrogenase |
S |
U/mL |
1 |
kU/L |
Insulin |
P |
µIU/mL |
6.945 |
pmol/L |
Iron |
S |
µg/dL |
0.179 |
µmol/L |
Iron binding capacity |
S |
µg/dL |
0.179 |
µmol/L |
Iron saturation |
S |
% |
0.01 |
fraction saturation |
Isocitrate dehydrogenase (ICD), Wolfson-Williams-Ashman |
S |
units/mL at 25° C |
0.0167 |
U/L at 25° C |
Isocitrate dehydrogenase (ICD) |
S |
U/L |
0.017 |
µKat/L |
Lactate |
S |
mg/dL |
0.111 |
mmol/L |
Lactate dehydrogenase (LD), Wroblewski |
S |
units/mL at 30° C |
0.482 |
U/L at 30° C |
Lactate dehydrogenase (LD) |
S |
U/L at 37° C |
1 |
U/L at 37° C |
LDL-cholesterol |
S |
mg/dL |
0.0259 |
mmol/L |
Lead |
S |
µg/dL |
0.0483 |
µmol/L |
Lead |
S |
mg/dL |
48.26 |
µmol/L |
Leucine aminopeptidase (LAP), Goldbarg-Rutenberg |
S |
U/mL |
0.24 |
U/L |
Leucine aminopeptidase (LAP) |
S |
U/L |
0.017 |
µKat/L |
Lipase, Cherry-Crandal |
S |
U/mL |
278 |
U/L |
Lipase |
S |
U/L |
0.017 |
µKat/L |
Lipids, total |
S |
mg/dL |
0.01 |
g/L |
Luteinizing hormone (LH) |
S |
mIU/mL |
1 |
IU/L |
Magnesium |
S |
mEq/L |
0.5 |
mmol/L |
Magnesium |
S |
mg/dL |
0.411 |
mmol/L |
Malic dehydrogenase |
S |
U/L |
0.017 |
µKat/L |
Methemoglobin |
WB |
g/dL |
10 |
g/L |
Muramidase |
S |
mg/L |
1 |
mg/L |
Myoglobin |
S |
µg/L |
1 |
µg/L |
Osmolality |
S |
mOsm/kg H2O |
1 |
mOsm/kg H2O |
Osteocalcin |
S |
ng/mL |
1 |
µg/L |
Oxygen partial pressure pO2 |
WB |
mm Hg |
0.133 |
kPa |
Parathyroid hormone (PTH) |
S |
pg/mL |
1 |
ng/L |
pH |
WB |
nEq/L |
1 |
nmol/L |
Phenylalanine |
S |
mg/dL |
60.54 |
µmol/L |
Phosphate, inorganic phosphorus |
S |
mg/dL |
0.323 |
mmol/L |
Porphobilinogen |
S |
µg/d |
4.42 |
µmol/d |
Potassium |
S |
mEq/L |
1 |
mmol/L |
Progesterone |
S |
ng/dL |
0.0318 |
nmol/L |
Prolactin |
S |
ng/mL |
1 |
µg/L |
Protein, total |
S |
g/dL |
10 |
g/L |
Protoporphyrin |
RBCS |
mg/dL |
0.0178 |
µmol/L |
Pyruvate |
WB |
mg/dL |
113.6 |
µmol/L |
Renin (plasma renin activity, PRA) |
S |
ng/mL/h |
1 |
µg/L•hr |
Reverse T3 (rT3) |
S |
ng/dL |
0.0154 |
nmol/L |
Serotonin |
S |
ng/mL |
0.0057 |
µmol/L |
Sodium |
S |
mEq/L |
1 |
mmol/L |
Testosterone |
S |
ng/dL |
0.0347 |
nmol/L |
Thyroglobulin |
S |
ng/mL |
1 |
µg/L |
Thyroxine binding globulin (TBG) |
S |
mg/dL |
10 |
mg/L |
Thyroxine binding globulin (TBG) |
S |
µg/dL |
10 |
µg/L |
Thyroid stimulating hormone (TSH) |
S |
µU/mL |
1 |
mIU/L |
Thyrotropin releasing hormone (TRH) |
S |
pg/mL |
1 |
ng/L |
Thyrotropin releasing hormone (TRH) |
S |
pg/mL |
2.759 |
pmol/L |
Thyroxine (T4) total |
S |
µg/dL |
12.9 |
nmol/L |
Thyroxine, free |
S |
ng/dL |
12.9 |
pmol/L |
Transferrin (TIBC) |
S |
mg/dL |
0.01 |
g/L |
Tri-iodothyronine (T3), free |
S |
pg/mL |
15.4 |
nmol/L |
Tri-iodothyronine (T3), total |
S |
ng/dL |
0.0154 |
nmol/L |
Triglycerides |
S |
mg/dL |
0.0113 |
mmol/L |
Troponin I |
S |
mg/mL |
1 |
µg/L |
Troponin I |
S |
µg/L |
1 |
µg/L |
Troponin T |
S |
µg/L |
1 |
µg/L |
Urea nitrogen |
S |
mg/dL |
0.357 |
mmol/L urea |
Uric acid |
S |
mg/dL |
0.0595 |
mmol/L |
Viscosity |
S |
centipoise |
1 |
centipoise |
Vitamin A1 |
S |
µg/dL |
0.0349 |
µmol/L |
Vitamin B12 (cyanocobalamin) |
S |
pg/mL |
0.738 |
pmol/L |
Vitamin B12, unsaturated binding capacity |
S |
pg/mL |
0.738 |
pmol/L |
Vitamin B6 |
S |
ng/mL |
5.982 |
nmol/L |
Vitamin C (ascorbic acid) |
S |
mg/dL |
5.678 |
µmol/L |
Vitamin D (calciferol, 1,25-dihydroxy) |
S |
pg/mL |
2.4 |
pmol/L |
Vitamin D (calciferol, 25-hydroxy) |
S |
ng/mL |
2.496 |
nmol/L |
Vitamin E (tocopherol) |
S |
ng/mL |
23.22 |
nmol/L |
Xylose (from absorption) |
S |
mg/dL |
0.0666 |
mmol/L |
Zinc |
S |
µg/dL |
0.153 |
µmol/L |
ICD-10: ,