Clinical Calculator
IV Iron Sucrose Dose Calculator
Calculate total iron requirement using the pregnancy Ganzoni formula, round the calculated requirement to the nearest 100 mg, apply the first-dose, subsequent-dose and rolling 7-day limits, and generate suggested appointment dates automatically.
How to use
- Enter the weight recorded during the booking visit, current Hb and preferred start date.
- Click Calculate & suggest dates.
- The calculated total iron requirement is rounded to the nearest 100 mg before generating the treatment plan.
- The first IV iron sucrose dose is limited to 200 mg. The second and subsequent doses are limited to 300 mg per visit, while also respecting the weight-based clinical ceiling and the 500 mg rolling 7-day maximum.
- You can change a suggested date later; subsequent dates will be recalculated automatically.
Input
Dose & Appointment Calculator
Enter only the values required for the dose and appointment calculation.
Enter the patient’s weight recorded during the booking visit.
Target Hb is fixed at 13.0 g/dL for this calculator.
The calculator uses this as the first suggested date and
automatically spaces later doses to keep the planned treatment
within the 500 mg rolling 7-day limit.
Calculated result
Total iron requirement
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Dose limits
—
First visit / subsequent visits
Weekly maximum
500 mg
Applied as a rolling 7-day window
Suggested appointments
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Suggested date
You can change any suggested date.
Dates from that appointment onward will be recalculated automatically
while keeping the 500 mg rolling 7-day limit.
| Visit | Suggested date | Dose | 7-day total after dose | Remaining |
|---|
Suggested dates are planning aids only.
Confirm the prescribed dose, formulation, dilution/infusion method,
contraindications, monitoring and local appointment availability
before administration.
Target Hb
13.0 g/dL
Pregnancy guideline target
Weekly maximum
500 mg
Per rolling 7-day window
Booking capacity
200 mg
Per local booking slot
Visit dose limit
200 / 300 mg
First / subsequent visits
Rules used in this calculator
- Ganzoni: weight × (13 − actual Hb) × 2.4 + iron stores.
- The calculated total iron requirement is rounded to the nearest 100 mg before generating the dose and appointment schedule.
- Iron stores: 500 mg for weight ≥35 kg. For weight <35 kg, this build uses 15 mg/kg as the product-information fallback and displays a warning to verify the local pregnancy guideline.
- Weight-based clinical ceiling: 7 mg/kg/session up to 500 mg/session.
- First IV iron sucrose visit: maximum 200 mg.
- Second and subsequent visits: maximum 300 mg per visit.
- Maximum cumulative planned dose: 500 mg in any rolling 7-day window.
- 1 local booking slot = up to 200 mg.
References
- Consensus Guidelines on Parenteral Iron Usage for Pregnant Women at Primary Care Facilities 2026 — local guideline supplied for the calculator build.
- Venofer 20 mg iron/mL SmPC (medicines.org.uk): https://www.medicines.org.uk/emc/product/5911/smpc