Laboratory Reference Ranges in Healthy Adults
The values listed below are generalizations. Each laboratory has specific reference ranges. [1, 2, 3]
Electrolytes
See the list below:
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Ammonia: 15-50 µmol/L
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Ceruloplasmin: 15-60 mg/dL
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Chloride: 95-105 mmol/L
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Copper: 70-150 µg/dL
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Creatinine: 0.8-1.3 mg/dL
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Blood urea nitrogen: 8-21 mg/dL
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Ferritin: 12-300 ng/mL (men), 12-150 ng/mL (women)
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Glucose: 65-110 mg/dL
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Inorganic phosphorous: 1-1.5 mmol/L
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Ionized calcium: 1.03-1.23 mmol/L
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Magnesium: 1.5-2 mEq/L
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Phosphate: 0.8-1.5 mmol/L
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Potassium: 3.5-5 mmol/L
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Pyruvate: 300-900 µg/dL
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Sodium: 135-145 mmol/L
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Total calcium: 2-2.6 mmol/L (8.5-10.2 mg/dL)
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Total iron-binding capacity: 45-85 µmol/L
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Total serum iron: 65-180 µg/dL (men), 30-170 µg/dL (women)
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Transferrin: 200-350 mg/dL
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Urea: 1.2-3 mmol/L
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Uric acid: 0.18-0.48 mmol/L
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Zinc: 70-100 µmol/L
Hematology
See the list below:
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Hemoglobin: 13-17 g/dL (men), 12-15 g/dL (women)
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Hematocrit 40%-52% (men), 36%-47%
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Glycosylated hemoglobin 4%-6%
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Mean corpuscular volume (MCV): 80-100 fL
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Red blood cell distribution width (RDW): 11.5%-14.5%
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Mean corpuscular hemoglobin (MCH): 0.4-0.5 fmol/cell
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Mean corpuscular hemoglobin concentration (MCHC): 30-35 g/dL
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Reticulocytes 0.5%-1.5%
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White blood cells (WBC) 4-10 x 10^9/L
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Neutrophils: 2-8 x 10^9/L
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Bands: < 1 x 10^9/L
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Lymphocytes: 1-4 x 10^9/L
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Monocytes: 0.2-0.8 x 10^9/L
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Eosinophils: < 0.5 x 10^9/L
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Platelets: 150-400 x 10^9/L
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Prothrombin time: 11-14 sec
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International normalized ratio (INR): 0.9-1.2
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Activated partial thromboplastin time (aPTT): 20-40 sec
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Fibrinogen: 1.8-4 g/L
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Bleeding time: 2-9 min
Lipids
See the list below:
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Triglycerides: 50-150 mg/dL
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Total cholesterol: 3-5.5 mmol/L
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High-density lipoprotein (HDL): 40-80 mg/dL
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Low-density lipoprotein (LDL): 85-125 mg/dL
Acid base
See the list below:
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pH: 7.35-7.45
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Base excess: (-3)-(+3)
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H+: 36-44 nmol/L
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Partial pressure of oxygen (pO2): 75-100 mm Hg
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Oxygen saturation: 96%-100%
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Partial pressure of carbon dioxide (pCO2): 35-45 mm Hg
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Bicarbonate (HCO3): 18-22 mmol/L
Gastrointestinal function
See the list below:
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Albumin: 35-50 g/L
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Alkaline phosphatase: 50-100 U/L
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Alanine aminotransferase (ALT): 5-30 U/L
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Amylase: 30-125 U/L
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Aspartate aminotransferase (AST): 5-30 U/L
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Direct bilirubin: 0-6 µmol/L
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Gamma glutamyl transferase: 6-50 U/L
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Lipase: 10-150 U/L
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Total bilirubin: 2-20 µmol/L
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Total protein: 60-80 g/L
Cardiac enzymes
See the list below:
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Creatine kinase: 25-200 U/L
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Creatine kinase MB (CKMB): 0-4 ng/mL
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Troponin: 0-0.4 ng/mL
Hormones
See the list below:
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17 hydroxyprogesterone (female, follicular): 0.2-1 mg/L
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Adrenocorticotropic hormone (ACTH): 4.5-20 pmol/L
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Estradiol: 1.5-5 ng/dL (male), 2-14 ng/dL (female, follicular), 2-16 ng/dL (female, luteal), < 3.5 ng/dL (postmenopausal)
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Free T3: 0.2-0.5 ng/dL
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Free T4: 10-20 pmol/L
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Follicle-stimulating hormone (FSH): 1-10 IU/L (male), 1-10 IU/L (female, follicular/luteal), 5-25 IU/L (female, ovulation), 30-110 IU/L (postmenopause)
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Growth hormone (fasting) : 0-5 ng/mL
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Progesterone: 70-280 (ovulation), ng/dL
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Prolactin: < 14 ng/mL
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Testosterone (male): 10-25 nmol/L
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Thyroxine-binding globulin: 12-30 mg/L
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Thyroid-stimulating hormone (TSH): 0.5-5 mIU/L
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Total T4, adult: 4.9-11.7 mg/dL
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Total T3: 0.7-1.5 ng/dL
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Free T3: 1.7-3.7 pg/mL
Vitamins
See the list below:
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Folate (serum) : 7-36 nmol/L
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Vitamin A: 30-65 µg/dL
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Vitamin B12: 130-700 ng/L
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Vitamin C: 0.4-1.5 mg/dL
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Vitamin D: 5-75 ng/mL
Tumor markers
See the list below:
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Alpha fetoprotein: 0-44 ng/mL
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Beta human chorionic gonadotropin (HCG): < 5 IU/I
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CA19.9: < 40 U/mL
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Carcinoembryonic antigen (CEA): < 4 ug/L
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Prostatic acid phosphatase (PAP): 0-3 U/dL
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Prostate-specific antigen (PSA): < 4 ug/L
Miscellaneous
See the list below:
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Alpha 1-antitrypsin: 20-50 µmol/L
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Angiotensin-converting enzyme: 23-57 U/L
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C-reactive protein: < 5 mg/L
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D-dimer: < 500 ng/mL
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Erythrocyte sedimentation rate (ESR): Less than age/2 mm/hour
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Lactate dehydrogenase (LDH): 50-150 U/L
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Lead: < 40 µg/dL
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Rheumatoid factor: < 25 IU/ml