Merck Manual

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Complete Blood Count (CBC)*

Complete Blood Count (CBC)*

Test

What It Measures

Normal Values

Hemoglobin

Amount of this oxygen-carrying protein within a volume of blood

Men: 14 to 17 grams per deciliter

Women: 12 to 16 grams per deciliter

Hematocrit

Proportion of the total amount of blood (blood volume) made up of red blood cells (plasma makes up the rest)

Men: 41 to 51%

Women: 36 to 47%

Mean cellular (or corpuscular) volume (MCV)

Average volume of a red blood cell

80 to 100 femtoliters per cell

Mean cellular (or corpuscular) hemoglobin (MCH)

Amount of hemoglobin per red blood cell

28 to 32 picograms per cell

Mean cellular (or corpuscular) hemoglobin concentration (MCHC)

Average concentration of hemoglobin within red blood cells

32 to 36 grams per deciliter of red blood cells (320 to 360 grams per liter)

Red blood cell (RBC) count

Number of RBCs in a volume of blood

Men: 4.5 to 5.9 million cells per microliter (4.5 to 5.9 × 1012/L)

Women: 4.0 to 5.2 million cells per microliter (4.05 to 5.2 × 1012/L)

Red cell distribution width

Amount of variability in the sizes of the red blood cells

11.5 to 14.5%

White blood cell count

Number of white blood cells in a specified volume of blood

4,500 to 11,000 per microliter (4.5 to 11 × 109/L)

Differential white blood cell count

Percentages and numbers of the different types of white blood cells

Segmented neutrophils: 40 to 70%, or 1800 to 7700 per microliter (1.8 to 7.7 x 109/L)

Lymphocytes: 22 to 44%, or 1000 to 4800 per microliter (1 to 4.8 × 109/L)

Monocytes: 4 to 11%, or 200 to 1200 per microliter (0.2 to 1.2 × 109/L)

Eosinophils: 0 to 8%, or 0 to 900 per microliter (0 to 0.9 × 109/L)

Basophils: 0 to 3%, or 0 to 300 per microliter (0 to 0.3 × 109/L)

Platelet count

Number of platelets in a specified volume of blood

140,000 to 450,000 per microliter (140 to 450 × 109/L)

* Normal values vary from laboratory to laboratory.