Ferritin Unit Converter

MedFinal Seamless Index

Ferritin is the primary intracellular protein responsible for storing iron and releasing it in a controlled fashion. Because a small amount of ferritin circulates in the blood, serum ferritin levels directly reflect the body’s total iron stores.[Image of iron metabolism cycle]

Clinically, ferritin is the most sensitive test for diagnosing Iron Deficiency Anemia (IDA). Low levels are diagnostic of IDA. However, ferritin also acts as a major acute-phase reactant (levels rise significantly during infection or inflammation), which can mask true iron deficiency. It is also used to monitor iron overload conditions (hemochromatosis). This converter ensures accurate switching between the standard SI mass unit (µg/L) and the conventional mass unit (ng/mL).

SI Units

Recommended

µg/L

ng/mL

Micrograms per liter or Nanograms per milliliter (Numerically 1:1).

Conventional Units

mg/L

mg/dL

µg/dL

µg/mL

pg/mL

g/L

Clinical Context

Reference Range (Adults):
• Men: ≈ 20 – 250 ng/mL
• Women: ≈ 10 – 150 ng/mL

In diagnosing Iron Deficiency Anemia, a serum ferritin level < 30 ng/mL is highly sensitive. If inflammation is present (CRP elevated), a threshold of > 100 ng/mL is often used to rule out true iron deficiency. ng/mL and µg/L are numerically equivalent, meaning they always have a 1:1 conversion ratio.

Clinical References

How to Use This Calculator

Follow these steps to get accurate clinical conversions instantly.

Enter Values

Input your laboratory results into the corresponding unit field (e.g., ng/mL). You can use either dot or comma decimals.

Automatic Conversion

The calculator works in real-time. As you type in one field, all other mass units are instantly updated.

Verify Units

Check the SI Units section. µg/L and ng/mL should always match.

Reset

Use the Clear button to reset all fields before starting a new calculation.

? Frequently Asked Questions & Tips

Is ng/mL the same as µg/L?

Yes. They are numerically identical. 1 ng/mL = 1 µg/L.

Why is the 30 ng/mL cutoff important?

A value below this level is highly suggestive of absolute iron deficiency and usually requires iron supplementation.

Disclaimer: This calculator is provided for educational and reference purposes only. It is not intended for clinical diagnosis, treatment, or medical decision-making. Always consult a qualified healthcare professional and refer to your laboratory’s official reference ranges before interpretation.

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