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Transferrin Saturation Calculator

Health

Calculate transferrin saturation (TSAT) from serum iron and total iron-binding capacity (TIBC). A standard lab reference calculation, not a diagnostic tool.

Reviewed by the thecalcu.com team · Last updated August 1, 2026

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Transferrin Saturation (TSAT)

24.24%

This calculator computes your Transferrin Saturation (TSAT) from the values you enter.

Inputs
Serum IronTIBC (Total Iron-Binding Capacity)
Outputs
Transferrin Saturation (TSAT)

What is a Transferrin Saturation?

The Transferrin Saturation Calculator computes TSAT from serum iron and total iron-binding capacity (TIBC), both commonly reported together on an iron studies panel. This is a standard lab reference calculation, not a diagnostic tool.

For a related iron-status calculation, see the Iron Deficiency Calculator.

Why Use a Transferrin Saturation Calculator?

TSAT requires combining two values from an iron studies panel, and this calculator performs that quick calculation instantly, saving the manual division.

Who Should Use This Calculator?

  • Anyone reviewing their own iron studies panel results who wants to calculate TSAT.
  • Students of hematology or nursing learning how TSAT is derived.
  • Healthcare educators demonstrating the standard TSAT formula.
  • Researchers working with iron status data.

What Insights Does the Transferrin Saturation Calculator Give You?

The Transferrin Saturation (TSAT) is the sole output, calculated directly from your entered serum iron and TIBC values, a standard figure used alongside the reference range in iron studies interpretation.

How to use this Transferrin Saturation calculator

  1. Enter your serum iron value in µg/dL.
  2. Enter your TIBC value in µg/dL.
  3. Read the TSAT instantly.
  4. Discuss any specific lab results with a qualified healthcare professional for proper interpretation.
Show formula & methodology ↓Show less ↑

Formula & Methodology

TSAT (%) = (Serum Iron ÷ TIBC) × 100

Worked example, a serum iron of 80 µg/dL and TIBC of 330 µg/dL:

TSAT = (80 ÷ 330) × 100 = 24.2%

Frequently Asked Questions

What is transferrin saturation (TSAT)?
Transferrin saturation is the percentage of transferrin (the main iron-transport protein in blood) that is currently bound to iron, calculated from serum iron and total iron-binding capacity (TIBC).
How is TSAT calculated?
TSAT is calculated by dividing serum iron by TIBC and multiplying by 100 to express the result as a percentage.
Is TSAT a diagnosis?
No, this calculator performs the mathematical conversion only. Interpreting what a specific TSAT value means for your health requires a qualified healthcare professional reviewing your complete lab results and clinical history.
What is TIBC?
TIBC (Total Iron-Binding Capacity) measures the total capacity of blood to bind iron via transferrin, reflecting how much additional iron the blood could carry beyond what's currently bound.
Where do I find serum iron and TIBC values?
Both are standard components of an iron studies panel, a blood test commonly ordered alongside ferritin when evaluating iron status.
How does TSAT relate to iron deficiency or iron overload discussions?
TSAT is one of several values commonly considered together when evaluating iron status, alongside serum iron, TIBC, and ferritin, any specific interpretation should come from a qualified healthcare professional reviewing the complete panel.
How does this relate to the Iron Deficiency Calculator?
TSAT reflects current iron transport status, while the [Iron Deficiency Calculator](/iron-deficiency-calculator/) estimates total body iron deficit using the Ganzoni formula, the two provide different but related perspectives on iron status.
What units does this calculator use?
This calculator uses micrograms per deciliter (µg/dL) for both serum iron and TIBC, standard units used in iron studies panel reporting.
Is TSAT always reported alongside ferritin?
TSAT and ferritin are commonly ordered together as part of a complete iron studies panel, since they provide complementary information about different aspects of iron status.
Can TSAT be higher than 100%?
In typical calculations TSAT stays below 100%, since serum iron is generally lower than TIBC, though unusual lab value combinations could theoretically produce values outside typical ranges, any unusual result should be discussed with a healthcare professional.
Also known as
TSAT calculatortransferrin saturation formulaserum iron TIBC ratioiron saturation calculator