🩸 Iron Deficit (Ganzoni Formula)
Calculate the total iron deficit for replacement with the Ganzoni formula.
Clinical takeaway
Includes correction of anaemia plus replenishment of stores.
Loading calculator…
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
When to use
Plan iron replacement (especially intravenous) in iron-deficiency anaemia.
How it works
Deficit (mg) = weight × (target − actual Hb) × 2.4 + iron stores (500 mg, or 15 mg/kg if < 35 kg).
Key points
- Includes correction of anaemia plus replenishment of stores.
- Dose IV iron per the chosen product's label.
- Recheck iron studies after replacement.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Weight | 70 kg |
|---|---|
| Current haemoglobin | 9 g/dL |
| Target haemoglobin | 15 g/dL |
→Total iron deficit1508mg
- Iron stores added：500 mg (500 mg)
- Formula：weight × (target − actual Hb) × 2.4 + stores
Frequently asked questions
- What is Iron Deficit (Ganzoni Formula)?
- Calculate the total iron deficit for replacement with the Ganzoni formula.
- How is Iron Deficit (Ganzoni Formula) calculated? What is the core formula?
- Deficit (mg) = weight × (target − actual Hb) × 2.4 + iron stores (500 mg, or 15 mg/kg if < 35 kg).
- When is Iron Deficit (Ganzoni Formula) used?
- Plan iron replacement (especially intravenous) in iron-deficiency anaemia.
- What are the key clinical points for Iron Deficit (Ganzoni Formula)?
- Includes correction of anaemia plus replenishment of stores. Dose IV iron per the chosen product's label. Recheck iron studies after replacement.
- What are the limits and cautions when using Iron Deficit (Ganzoni Formula)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Iron Deficit (Ganzoni Formula) calculated in practice? Can you show a worked example?
- Inputs: Weight 70 kg, Current haemoglobin 9 g/dL, Target haemoglobin 15 g/dL → Result: Total iron deficit 1508 mg（Iron stores added: 500 mg (500 mg), Formula: weight × (target − actual Hb) × 2.4 + stores）