| Test | Conventional | SI | Threshold |
|---|---|---|---|
| Absolute Neutrophil Count (ANC) | 2500-7000 cells/µL | 2.5-7 10⁹/L | < 500 cells/µL is severe neutropenia (high infection risk) |
| Basophils (%) | 0-1 % of WBC | 0-0.01 fraction | - |
| Eosinophils (%) | 1-4 % of WBC | 0.01-0.04 fraction | - |
| Hematocrit (Hct) | 36-52 % | 0.36-0.52 proportion of 1.0 | < 20% or > 60% |
| Hemoglobin (Hgb) | 12-17.5 g/dL | 120-175 g/L | < 7.0 g/dL (70 g/L) usually prompts transfusion consideration; > 20 g/dL |
| Lymphocytes (%) | 20-40 % of WBC | 0.2-0.4 fraction | - |
| Mean Corpuscular Hemoglobin (MCH) | 27-33 pg/cell | 27-33 pg | - |
| Mean Corpuscular Hemoglobin Concentration (MCHC) | 32-36 g/dL | 320-360 g/L | - |
| Mean Corpuscular Volume (MCV) | 80-100 fL | 80-100 fL | - |
| Monocytes (%) | 2-8 % of WBC | 0.02-0.08 fraction | - |
| Neutrophils (%) | 40-70 % of WBC | 0.4-0.7 fraction | - |
| Platelet Count | 150-400 10³/µL | 150-400 10⁹/L | < 50 × 10⁹/L (bleeding risk) - spontaneous bleeding risk rises sharply < 20; > 1,000 |
| Red Blood Cell Count (RBC) | 4.2-5.9 10⁶/µL | 4.2-5.9 10¹²/L | - |
| Red Cell Distribution Width (RDW) | 11.5-14.5 % | 11.5-14.5 % | - |
| Reticulocyte Count | 0.5-2.5 % of RBC | 0.005-0.025 fraction | - |
| White Blood Cell Count (WBC) | 4.5-11 10³/µL | 4.5-11 10⁹/L | < 2.0 or > 30.0 × 10⁹/L (severe leukopenia or marked leukocytosis) |
Panel
Complete Blood Count (CBC)
Red cells, white cells, platelets, and the red-cell indices used to classify anemia and infection. 16 tests, 5 with a taught threshold.
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Frequently asked questions
What tests are in a Complete Blood Count (CBC)?
The Complete Blood Count (CBC) on this page lists 16 tests: Absolute Neutrophil Count (ANC), Basophils (%), Eosinophils (%), Hematocrit (Hct), Hemoglobin (Hgb), Lymphocytes (%), Mean Corpuscular Hemoglobin (MCH), Mean Corpuscular Hemoglobin Concentration (MCHC), Mean Corpuscular Volume (MCV), Monocytes (%), Neutrophils (%), Platelet Count, Red Blood Cell Count (RBC), Red Cell Distribution Width (RDW), Reticulocyte Count, White Blood Cell Count (WBC). Each is shown with its conventional and SI teaching reference range.
What does the Complete Blood Count (CBC) check for?
Red cells, white cells, platelets, and the red-cell indices used to classify anemia and infection. These are educational teaching values - ranges vary by laboratory and method, and are not for clinical decisions.
Which Complete Blood Count (CBC) values are critical?
5 of the 16 tests in this Complete Blood Count (CBC) carry a taught threshold: Absolute Neutrophil Count (ANC) (< 500 cells/µL is severe neutropenia (high infection risk)); Hematocrit (Hct) (< 20% or > 60%); Hemoglobin (Hgb) (< 7.0 g/dL (70 g/L) usually prompts transfusion consideration; > 20 g/dL); Platelet Count (< 50 × 10⁹/L (bleeding risk) - spontaneous bleeding risk rises sharply < 20; > 1,000); White Blood Cell Count (WBC) (< 2.0 or > 30.0 × 10⁹/L (severe leukopenia or marked leukocytosis)). These are teaching thresholds, not clinical cutoffs - always use the values your laboratory reports.