Total Iron Deficit Calculator — Ganzoni Equation

                            Total iron deficit

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Total Iron Deficit — Ganzoni equation

Estimate iron required to correct haemoglobin and replenish stores. Informational — always apply clinical judgment and local protocols.

Enter patient data

Weight (kg)

Use kg. Example: 80

Iron stores (mg)

Default: 500 mg for adults ≥35 kg; otherwise 15 mg/kg.

Target Hb (g/L)

Current Hb (g/L)

Formula (Ganzoni): Iron deficit (mg) = body weight (kg) × (target Hb − actual Hb in g/dL) × 2.4 + iron stores (mg). (The form converts g/L → g/dL automatically.)

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Total Iron Deficit:

— mg

( recommended)

Infographic & guidance

— mg

Example: Weight 80 kg, Target 150 g/L, Current 90 g/L, Stores 500 mg

Interpretation

This tool gives an estimated iron deficit to guide replacement therapy planning. Confirm product dose limits, local protocols, and patient factors (bleeding, inflammation, renal disease). Not a substitute for clinical judgment.

© Rhodium Libra — For educational use

Reference: Ganzoni AM. Intravenous iron-dextran: therapeutic and experimental possibilities. Schweiz Med Wochenschr. 1970;100(7):301-3.

Total iron deficit can be calculated by the Ganzoni equation, which is used in the management of iron deficiency anaemia. It estimates the amount of iron required to replenish body stores and correct haemoglobin levels, factoring in the patient's current haemoglobin, target haemoglobin, body weight, and existing iron stores. It is applied to determine the appropriate iron supplementation, particularly in cases requiring intravenous iron therapy, ensuring both efficacy and safety in the treatment of iron deficiency anaemia.

References

Ganzoni AM. Intravenous iron-dextran: therapeutic and experimental possibilities. Schweiz Med Wochenschr.