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Total Iron-Binding Capacity
Abbreviation: TIBC
Panel: Iron Studies · All iron studies tests
Typical adult reference range
| Conventional units | 250–450 µg/dL |
| SI units | 45–81 µmol/L |
Ranges vary between laboratories and methods — compare your result with the range printed on your own report.
What a high or low result can mean
High total iron-binding capacity: high values can be seen in iron deficiency and pregnancy.
Low total iron-binding capacity: low values may occur in chronic inflammation, malnutrition, or liver disease.
These are associations, not a diagnosis: the same result can have several causes, and your clinician interprets it with the rest of your results and history.
Good to know
Usually calculated from transferrin or measured as iron plus UIBC.
Related tests — Iron Studies
Please note: Reference ranges vary between laboratories, and between the methods and instruments they use — the range printed on your own report is the one your result should be compared with. A result outside the range is not by itself a diagnosis, and a result inside it does not rule out illness. These pages are an educational summary, not medical advice: always discuss your results with the clinician who ordered them, who can interpret them in the context of your health and history.