Reference Values for Common Blood Tests

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Last updated 7:26 PM on 7/20/26
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48 Terms

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Hematocrit (Hct)

42%-50% (in men) / 36%-45% (in women)

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Hemoglobin (Hgb)

14-18 g/dL (in men) / 12-16 g/dL (in women)

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International normalized ratio (INR)

0.9-1.1

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Mean corpuscular hemoglobin (MCH)

26-34 pg/cell

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Mean corpuscular hemoglobin concentration (MCHC)

33-37 g/dL

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Mean corpuscular volume (MCV)

80-100 fL/cell

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Partial thromboplastin time (PTT)

25-40 seconds

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Platelet count (Plt)

150,000-350,000 cells/mm³

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Prothrombin time (PT)

10-13 seconds

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Red blood cell count (RBC)

4.5-5.9 million cells/mm³ (in men) / 4.1-5.1 million cells/mm³ (in women)

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Reticulocytes

0.5%-1.5%

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White blood cell count (WBC)

4.5-11.0 × 10³ cells/mm³

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Alanine aminotransferase (ALT)

10-40 U/L

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Albumin

3.5-5 g/dL (in adults) / 3.4-4.2 g/dL (in children)

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Alkaline phosphatase (ALP)

30-120 IU/L (in adults) / 150-420 IU/L (in children)

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Ammonia

15-45 mcg/dL

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Amylase

27-131 U/L

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Aspartate aminotransferase (AST)

10-30 U/L

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Bilirubin (direct)

0.1-0.3 mg/dL

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Bilirubin (total)

0.3-1.2 mg/dL

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Blood urea nitrogen (BUN)

8-23 mg/dL (in adults)

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Total serum calcium

8.2-10.2 mg/dL

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Carbon dioxide (venous) (CO2)

22-28 mEq/L

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Chloride (Cl)

96-106 mEq/L

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C-reactive protein (CRP)

0.08-3.1 mg/L

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Creatinine kinase (CK)

40-150 U/L

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Creatinine, serum (SCr)

0.6-1.2 mg/dL (in adults) / 0.2-0.7 mg/dL (in children)

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Creatinine (clearance) (CrCl)

75-125 mL/minute/1.73m²

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Ferritin

15-200 ng/mL

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Gamma-glutamyl transpeptidase

2-30 U/L

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Serum glucose

70-110 mg/dL

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Hemoglobin A1C

4%-7%

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Lactate dehydrogenase (LDH)

100-200 U/L

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Lipase

31-186 U/L

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Magnesium

1.3-2.1 mEq/L

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Phosphorus

2.3-4.7 mg/dL (in adults) / 3.7-5.6 mg/dL (in children)

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Potassium

3.5-5.0 mEq/L

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Sodium

136-142 mEq/L

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Uric acid

4-8 mg/dL

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Total cholesterol (TC)

<200 mg/dL

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High-density lipoprotein (HDL)

>40 mg/dL

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Low-density lipoprotein (LDL)

<100 mg/dL

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Triglycerides (TG)

<150 mg/dL

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pH

arterial: 7.35-7.45 / venous: 7.31-7.41

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Partial pressure of carbon dioxide (PCO2)

arterial: 35-45 mmHg / venous: 38-52 mmHg

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Partial pressure of oxygen (PO2)

arterial: 80-100 mmHg / venous: 40-50 mmHg

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Oxygen saturation (SaO2)

arterial: >90% / venous: 60%-75%

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Serum bicarbonate (HCO3)

arterial: 22-26 mEq/L / venous: 21-28 mEq/L