Reference Values for Commonly Ordered Tests

REFERENCE VALUES FOR COMMONLY ORDERED TESTS
Analyte Specimen Reference value
Conventional units SI units

Adrenocorticotropin (ACTH)

P 6.0−76.0pg/mL 1.3−16.7pmol/L

Aminotransferases

S

  Aspartate (AST, SGOT)


0−35U/L 0−0.58μkat/L

  Alanine (ALT, SGPT)


0−35U/L 0−0.58μkat/L

Ammonia (as NH3)

P 10−80μg/dL 6−47μmol/L

Amylase

S 60−180U/L 0.8−3.2μkat/L

Anion gap

S 7−16mmol/L 7−16mmol/L

Antinuclear antibody

S Negative at 1:40 dilution N/A

Antithrombin III

P

  Antigenic


22−39mg/dL 220−390mg/L

  Functional


80−130% 0.8−1.30U/L

Arterial blood gases (sea level)

WB, arterial

  Bicarbonate (HCO3)


21−30mEq/L 21−28mmol/L

  Partial pressure of carbon dioxide (PCO2)


35−45mmHg 4.7−5.9kPa

  pH


7.38−7.44 7.38−7.44

  Partial pressure of oxygen (PO2)


80−100mmHg 11−13kPa

Bilirubin

S

  Total


0.3−1.0mg/dL 5.1−17.0μmol/L

  Direct


0.1−0.3mg/dL 1.7−5.1μmol/L

  Indirect


0.2−0.7mg/dL 3.4−12.0μmol/L

Bleeding time


2.0−9.5min 2.0−9.5min

Calcitonin

S

  Male


3−26pg/mL 3−26ng/L

  Female


2−17pg/mL 2−17ng/L

Calcium

S 9.0−10.5mg/dL 2.2−2.6mmol/L

Calcium, ionized

WB 4.5−5.6mg/dL 1.1−1.4mmol/L

Carbon dioxide




  Content (sea level)

P 21−30mEq/L 21−30mmol/L

  Partial pressure (PCO2) (sea level)

WB, arterial 35−45mmHg 4.7−5.9kPa

Carcinoembryonic antigen (CEA)

S 0−3.4ng/mL 0−3.4μg/L

Chloride

S 98−106mEq/L 98−106mmol/L

Cholesterol (totals)*

P

    Desirable


<200mg/dL <5.17mmol/L

    Borderline high


200−239mg/dL 5.17−6.18mmol/L

    High


≥240mg/dL ≥6.18mmol/L

  Low-density lipoprotein (LDL) cholesterol

P

    Desirable


<100mg/dL <2.59mmol/L

    Near or above normal


100−129mg/dL 2.59−3.34mmol/L

    Borderline high


130−159mg/dL 3.36−4.11mmol/L

    High


160−189mg/dL 4.13−4.88mmol/L

    Very high


≥190mg/dL ≥4.91mmol/L

  High-density lipoprotein (HDL) cholesterol

P

    Low


<40mg/dL <1.03mmol/L

    High


≥60mg/dL ≥1.55mmol/L

Copper

S 70−140μg/dL 11−22μmol/L

Cortisol

S

  Fasting, 8am−noon


5−25μg/dL 138−690nmol/L

  Noon−8pm


5−15μg/dL 138−414nmol/L

  8pm−8am


0−10μg/dL 0−276nmol/L

Creatine kinase (totals)

S

  Male


60−400U/L 1.00−6.67μkat/L

  Female


40−150U/L 0.67−2.50μkat/L

  MB isoenzyme


0−7ng/mL 0−7μg/L

Creatinine

S <1.5mg/dL <133μmol/L

Erythrocyte count

WB

  Male


4.50−5.90 × 106/mm3 4.50−5.90 × 1012/L

  Female


4.00−5.20 × 106/mm3 4.00−5.20 × 1012/L

Erythrocyte sedimentation rate

WB

  Male


0−17mm/hr 0−17mm/hr

  Female


1−25mm/hr 1−25mm/hr

Ferritin

S

  Male


30−300ng/mL 30−300μg/L

  Female


10−200ng/mL 10−200μg/L

Fibrinogen

P 150−400mg/dL 1.5−4.0g/L

Folate (folic acid)

S, P

  Normal


3.1−17.5ng/mL 7.0−39.7nmol/L

  Borderline deficient


2.2−3.0ng/mL 5.0−6.8nmol/L

  Deficient


<2.2ng/mL <5.0nmol/L

  Excess


>17.5ng/mL >39.7nmol/L

Folic acid

RC 150−450ng/mL/cells 340−1020nmol/L/cells

Follicle-stimulating hormone (FSH)

S, P

  Female, menstruating




    Follicular phase


3.0−20.0 mIU/mL 3.0−20.0 IU/L

    Ovulatory phase


9.0−26.0 mIU/mL 9.0−26.0 IU/L

    Luteal phase


1.0−12.0 mIU/mL 1.0−12.0 IU/L

  Female, postmenopausal


18.0−153.0 mIU/mL 18.0−153.0 IU/L

  Male


1.0−12.0 mIU/mL 1.0−12.0 IU/L

Glucose

P

  Fasting, normal


75−115mg/dL 4.2−6.4mmol/L

  Fasting, diabetes mellitus


>125mg/dL >7.0mmol/L

  2-hour postprandial


120mg/dL <6.7mmol/L

Glucose-6-phosphate dehydrogenase, erythrocyte

WB No gross deficiency N/A

γ-Glutamyltransferase

S 1−94U/L 1−94U/L

Haptoglobin

S 16−199mg/dL 0.16−1.99g/L

Hematocrit

WB

  Male


41.0−53.0% 0.41−0.53

  Female


36.0−46.0% 0.36−0.46

Hemoglobin




  Plasma

P 1−5mg/dL 0.01−0.05g/L

  Whole blood, male

WB 13.5−17.5g/dL 8.4−10.9mmol/L

  Whole blood, female

WB 12.0−16.0g/dL 7.4−9.9mmol/L

Hemoglobin electrophoresis

WB

  Hemoglobin A


95−98% 0.95−0.98

  Hemoglobin A1c


3.8−6.4% 0.038−0.064 Hg fraction

  Hemoglobin A2


1.5−3.5% 0.015−0.035

  Hemoglobin F


0−2.0% 0−0.02

  Hemoglobins other than A, A2, or F


Absent Absent

Iron (hematology and coagulation values)

S 30−160μg/dL 5.4−28.7μmol/L

Iron-binding capacity (hematology and coagulation values)

S 228−428μg/dL 40.8−76.7μmol/L

Iron (clinical chemistry values)

S 50−150μg/dL 9−27μmol/L

Iron-binding capacity (clinical chemistry values)

S 250−370μg/dL 45−66μmol/L

Lactate

P, venous 5−15mg/dL 0.6−1.7mmol/L

Lactate dehydrogenase isoenzymes

S

  Fraction 1 (of total)


14−26% 0.14−0.25

  Fraction 2


29−39% 0.29−0.39

  Fraction 3


20−26% 0.20−0.25

  Fraction 4


8−16% 0.08−0.16

  Fraction 5


6−16% 0.06−0.16

Lactate dehydrogenase

S 100−190U/L 1.7−3.2μkat/L

Lead (adult)

S <10−20μg/dL <0.5−1μmol/L

Leukocyte count (WBC)

WB 4.5−11.0 × 103/mm3 4.5−11.0 × 109/L

Lipase

S 0−160U/L 0−2.66μkat/L

Magnesium

S 1.8−3.0mg/dL 0.8−1.2mmol/L

Mean corpuscular hemoglobin (MCH)

WB 26.0−34.0pg/cell 26.0−34.0pg/cell

Mean corpuscular hemoglobin concentration (MCHC)

WB 31.0−37.0g/dL 310−370g/L

Mean corpuscular volume (MCV)

WB 80−100μm3 80−100fl

Osmolality

P 285−295mOsm/kg serum water 285−295mmol/kg serum water

Oxygen




  Content (sea level)

WB (arterial) 17−21 vol%

  

WB (venous, arm) 10−16 vol%

  Saturation (sea level)

WB (arterial) 97% 0.97mol/mol

  

WB (venous, arm) 60−85% 0.60−0.85mol/mol

  Partial pressure (PO2)

WB 80−100mmHg 11−13kPa

Partial-thromboplastin time (activated)

P 22.1−35.1sec 22.1−35.1sec

Phosphatase

S

  Acid


0−5.5U/L 0.90nkat/L

  Alkaline


30−120U/L 0.5−2.0nkat/L

Phosphorus, inorganic

S 3−4.5mg/dL 1.0−1.4mmol/L

Platelet count

WB 150−350 × 103/mm3 150−350 × 109/L

Potassium

S 3.5−5.0mEq/L 3.5−5.0mmol/L

Progesterone

S, P

  Female, menstruating




    Follicular


<0.2ng/mL <0.6nmol/L

    Midluteal


3−20ng/mL 9.54−63.6nmol/L

  Male


<0.2−1.4ng/mL <0.60−4.45nmol/L

Prolactin

S

  Male


0−15ng/mL 0−15μg/L

  Female


0−20ng/mL 0−20μg/L

Prostate-specific antigen (PSA)

S

  Female


<0.5ng/mL <0.5μg/L

  Male




    ≤40 years


0−2.0ng/mL 0−2.0μg/L

    >40 years


0−4.0ng/mL 0−4.0μg/L

Protein

S

  Total


5.5−8.0g/dL 55−80g/L

  Fractions




    Albumin


3.5−5.5g/dL (50−60%) 35−55g/L

    Alpha1


0.2−0.4g/dL (4.2−7.2%) 2−4g/L

    Alpha2


0.5−0.9g/dL (6.8−12%) 5−9g/L

    Beta


0.6−1.1g/dL (9.3−15%) 6−11g/L

    Gamma


0.7−1.7g/dL (13−23%) 7−17g/L

    Globulin


2.0−3.5g/dL (40−50%) 20−35g/L

Protein C

P

  Total antigen


70−140% 0.70−1.40

  Functional


70−140% 0.70−1.40

Protein S

P

  Total antigen


70−140% 0.70−1.40

  Functional


70−140% 0.70−1.40

  Free antigen


70−140% 0.70−1.40

Prothrombin time

P 11.1−13.1sec 11.1−13.1sec

Reticulocyte count

WB 0.5−2.5% red cells 0.005−0.025 red cells

Rheumatoid factor

S, JF <30.0 IU/mL <30.0 kIU/L

Sodium

S 136−145mEq/L 136−145mmol/L

Testosterone

S

  Total (morning)




    Female


6−86ng/dL 0.21−2.98nmol/L

    Male


270−1070ng/dL 9.36−37.10nmol/L

Thyroid hormone function tests

S

  Thyroid-stimulating hormone (TSH)


0.5−4.7μU/mL 0.5−4.7mU/L

  Thyroxine




    Total (T4)


4.5−10.9μg/dL 58−140nmol/L

    Free (fT4)


0.8−2.7ng/dL 10.3−35.0pmol/L

  Triiodothyronine




    Total (T3)


60−181ng/dL 0.92−2.78nmol/L

    Free (fT3)


1.4−4.4pg/mL 0.22−6.78pmol/L

Transferrin

S 230−390mg/dL 2.3−3.9g/L

Triglycerides

S <160mg/dL <1.8mmol/L

Urea nitrogen

S 10−20mg/dL 3.6−7.1mmol/L

Uric acid

S

  Male


2.5−8.0mg/dL 150−480μmol/L

  Female


1.5−6.0mg/dL 90−360μmol/L

Vitamin A

S 20−100μg/dL 0.7−3.5μmol/L

Vitamin B12

S, P

  Normal


>250pg/mL >185pmol/L

  Borderline


125−250pg/mL 92−185pmol/L

  Deficient


<125pg/mL <92pmol/L
NOTES

Key:  JF = joint fluid; P = plasma; RC = red cells; S = serum; WB = whole blood.

REFERENCES

*National Institutes of Health. Third report of the Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III). September 2002. www.nhlbi.nih.gov/guidelines/cholesterol/index.htm. Accessed February 28, 2013.

Adapted from Kratz A, Ferraro M, Sluss P, et al. Laboratory reference values. N Engl J Med. 2004;351(15):1548−1563.

(Created 5/2013)

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