Transferrin to TIBC
Calculate total iron-binding capacity (TIBC) from transferrin. Enter your transferrin level in mg/dL, get TIBC with clinical interpretation and free online iron studies chart.
About This Calculator
Our Transferrin to TIBC Calculator helps you compute your total iron-binding capacity (TIBC) from your transferrin blood test level using the clinically validated formula TIBC (\u00B5g/dL) = Transferrin (mg/dL) × 1.25. Transferrin is the primary iron transport protein in the blood, and its concentration directly reflects the body's capacity to bind and transport iron. This calculator is designed for patients reviewing their iron studies panel, healthcare professionals interpreting lab results, and anyone monitoring their iron metabolism.
The calculation is straightforward: multiply your transferrin value in mg/dL by the conversion factor 1.25 to obtain TIBC in \u00B5g/dL. The result is also provided in SI units (\u00B5mol/L) for international compatibility. Alongside your calculated TIBC, you receive a clinical interpretation based on established reference ranges (transferrin: 200\u2013360 mg/dL; TIBC: 250\u2013450 \u00B5g/dL). A low transferrin level may suggest iron overload, chronic inflammation, or liver disease, while an elevated level commonly points to iron deficiency anemia. Always consult your doctor for a complete assessment including serum ferritin, serum iron, and transferrin saturation.
Regional Notes
India: Transferrin and TIBC are measured in mg/dL and \u00B5g/dL respectively, consistent with global standards. Labs may also report using SI units (\u00B5mol/L). Reference ranges may vary slightly between laboratories.
United States: Transferrin is reported in mg/dL and TIBC in \u00B5g/dL by most US laboratories. The formula TIBC = transferrin × 1.25 is the standard conversion used in clinical practice.
United Kingdom: UK labs commonly report transferrin in g/L and TIBC in \u00B5mol/L. To convert from g/L to mg/dL, multiply by 100. To convert TIBC from \u00B5g/dL to \u00B5mol/L, divide by 5.585.
Frequently Asked Questions
What is transferrin?
Transferrin is a protein produced by the liver that is the main carrier of iron in the blood. It transports iron throughout the body and helps regulate iron absorption and distribution. Each transferrin molecule can bind up to two iron (Fe³\u00B2) ions for transport.
What is TIBC and how is it calculated from transferrin?
Total iron-binding capacity (TIBC) is an indirect measure of transferrin that represents the maximum amount of iron your blood can bind. It is calculated using the formula: TIBC (\u00B5g/dL) = Transferrin (mg/dL) × 1.25. For example, a transferrin level of 300 mg/dL gives a TIBC of 375 \u00B5g/dL.
What are normal transferrin levels?
Normal transferrin levels range from 200 to 360 mg/dL (2.0 to 3.6 g/L). This corresponds to a normal TIBC range of 250 to 450 \u00B5g/dL (44.8 to 80.6 \u00B5mol/L). Reference ranges may vary slightly between laboratories in India, the US, and the UK.
What does a low transferrin level mean?
Low transferrin (< 200 mg/dL) with low TIBC (< 250 \u00B5g/dL) may indicate iron overload conditions such as hereditary hemochromatosis, chronic inflammatory disorders, malnutrition, liver disease (cirrhosis, hepatitis), or nephrotic syndrome. It can also be seen in malignancy and chronic infections.
What does a high transferrin level mean?
High transferrin (> 360 mg/dL) with elevated TIBC (> 450 \u00B5g/dL) is most commonly associated with iron deficiency anemia. Other causes include pregnancy, estrogen therapy, oral contraceptive use, and blood loss. The body produces more transferrin to maximize iron absorption when iron stores are low.
How accurate is this calculator?
This calculator uses the standard clinical formula TIBC = transferrin × 1.25, which is universally accepted in medical practice across India, the US, the UK, and other countries. Results should be verified by a healthcare professional and interpreted alongside other iron studies including serum ferritin, serum iron, and transferrin saturation.
Can I rely on this for diagnosis?
No. This calculator is for educational and reference purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider for interpretation of your blood test results and appropriate clinical management.