Green & King Index
Green & King index (1989) = (MCV^2 x RDW) / (Hb x 100); < 65 suggests beta-thalassemia trait, > 65 iron deficiency.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- MCV
- 70 fL
- RDW
- 14 %
- Hemoglobin
- 11 g/dL
Result: Green & King index 62.4 — thalassemia trait suggested (< 65).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- < 65
- Beta-thalassemia trait suggested.
- > 65
- Iron-deficiency suggested ((MCV^2 x RDW) / (Hb x 100); cutoff varies by population). A discrimination index, not a diagnosis.
What you enter
- MCV
- RDW
- Hemoglobin
How this is calculated
Green R, King R. A new red cell discriminant incorporating volume dispersion for differentiating iron deficiency anemia from thalassemia minor. Blood Cells. 1989;15(3):481-491. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.