Work out iron deficit dose instantly with clear inputs, formula shown and shareable results.
Applies the Ganzoni formula, which combines the iron needed to correct haemoglobin with a fixed allowance for replenishing iron stores.
Ganzoni formula
Iron deficit (mg) = body weight (kg) x (target Hb - actual Hb) x 2.4 + iron stores (usually 500 mg)
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
It combines blood volume per kilogram, the iron content of haemoglobin and the conversion from g/dL to g/L.
500 mg is standard for adults; 15 mg/kg is used in children under 35 kg.