Reference Values for Complete Blood Count
| CBC Component | Newborn | 1 Mo | 6 Mo | 1-10 Yr | Adult Male | Adult Female |
|---|---|---|---|---|---|---|
Red blood cells (RBCs) | ||||||
| 4.8-7.1 million/mm3 4.8-7.1 × 1012/L (SI units) | 4.1-6.4 million/mm3 | 3.8-5.5 million/mm3 | 4.5-4.8 million/mm3 | 4.6-6.2 million/mm3 | 4.2-5.4 million/mm3 | |
| Hematocrit (Hct) | ||||||
| 4.4-64% | 35-49% | 30-40% | 35-41% | 40-54% | 38-47% | |
| Hemoglobin (Hgb) | ||||||
| 14-24 g/L (SI units) | 11-20 g/dL | 10-15 g/dL | 11-16 g/dL | 13.5-18 g/dL | 12-16 g/dL | |
| 140-240 g/L (SI units) | 110-200 g/L | 100-150 g/L | 110-160 g/L | 135-180 g/L | 120-160 g/L | |
| RBC indices | ||||||
| MCV* | 96-108 µm3 | 82-91 µ3 | – | – | 80-94 µm3 | 81-99 µm3 |
| 96-108 fL (SI units) | 82-91 fL | – | – | 80-94 fL | 81-99 fL | |
| MCH† | 32-34 pg | 27-31 pg | – | – | 27-31 pg | |
| MCHC‡ | 32-33% | 32-36% | – | – | 32-36% | |
| 320-330 S/L (SI units) | 320-360 S/L | 320-360 S/L | ||||
| Stained RBC examinition | Normochromic and normocytic for all age groups and both sexes (see p. 23) | |||||
| White blood cells (WBCs) | 9,000-30,000/mm3 9,000-30,000 × 109/L (SI units) | 6,000-18,000/mm3 | 6,000-16,000/mm3 | 5,000-13,000/mm3 | 5,000-10,000/mm3 | |
| Differential WBC | ||||||
| Neutrophils |  45% by 1 wk | 40% by 4 wk | 32% | 60% after age 2 yr | 54-75% (3000-7500/mm3) | 54-75% (3000-7500/mm3) |
| Bands | – | – | – | – | 3-8% (150-700/mm3) | 3-8% (150-700/mm3) |
| Eosinophils | – | – | – | 0-3% | 1-4% (50-400/mm3) | 1-4% (50-400/mm3) |
| Basophils | – | – | – | 1-3% | 0-1% (25-100/mm3) | 0-1% (25-100/mm3) |
| Monocytes | – | – | – | 4-9% | 2-8% (100-500/mm3) | 2-8% (100-500/mm3) |
| Lymphocytes |  41% by 1 wk | 56% by 4 wk | 61% | 59% after age 2 yr | 25-40% (1500-4500/mm3) | 25-40% (1500-4500/mm3) |
| T lymphocytes | – | – | – | – | 60-80% of lymphocyte | 60-80% of lymphocytes |
| B lymphocytes | – | – | – | – | 10-20% of lymphocytes | 10-20% of lymphocytes |
| Platelets | 140,000-300,000/mm3 | 150,000-390,000/mm3 | 200,000-473,000/mm3 | 150,000-450,000/mm3 | 150,000-450,000/mm3 | |
| 140-300 × 109/L (SI units) | 150-390 × 109/L | 200-473 × 109/L | 150-450 × 109/L | 150-450 × 109/L | ||
* Mean corpuscular volume.
† Mean corpuscular hemoglobin.
‡ Mean corpuscular hemoglobin concentration.