Estimate a modeled total iron deficit using body weight, a hemoglobin gap and an iron-store allowance.
Iron Deficiency Calculator
Form
Results
Iron stores
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Deficit
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Table of Contents
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What is Iron Deficiency?
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How to Use This Calculator
- Enter or select Weight, Actual hemoglobin, Target hemoglobin.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
Iron deficit(mg) = weight(kg) × (target Hb−actual Hb in g/dL) × 2.4 + store allowance.
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Variables Explained
| Input | What it means |
|---|---|
| Weight | Measured mass in the chosen unit; pounds and kilograms are not numerically interchangeable. |
| Actual hemoglobin | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Target hemoglobin | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
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Worked Example
At 60 kg with a 2 g/dL Hb gap and an assumed 500 mg store allowance, the estimate is 788 mg.
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Why Use This Calculator?
Use the calculation to make the method and its inputs easier to check with a healthcare professional. Its meaning depends on the clinical setting and on whether the underlying method is appropriate for that person.
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Common Mistakes
- Iron formulation, indication, contraindications and dose limits require clinical review; the estimate is not a dose order.
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Frequently Asked Questions
Is this result a diagnosis or treatment instruction?
No. It describes a calculation or score from the supplied information. A qualified clinician must check the measurements, the method’s applicability and the wider clinical picture.
Can I enter the units from any lab report?
Use the units specified in the form and select a conversion only where the page provides one. Different substances need different conversion factors; a mismatch can produce a plausible but incorrect result.
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Sources & References
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