Elemental Iron Ingested (Toxic Dose)
Elemental iron ingested estimator: elemental mg = tablets x mg iron salt per tablet x percent elemental (ferrous sulfate 20%, gluconate 12%, fumarate 33%, or elemental=100%); dose mg/kg = elemental / weight.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Number of tablets ingested
- 20
- Iron salt per tablet
- 325 mg
- Iron salt
- Ferrous sulfate (20% elemental)
- Body weight
- 20 kg
Result: Elemental iron 1300 mg; 65 mg/kg — severe / potentially serious toxicity.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Thresholds
- < 20 mg/kg minimal, 20-60 mild-moderate, > 60 severe / potentially serious, > 150 potentially lethal.
- Caution
- Advisory triage estimate from a reported amount; involve Poison Control and use a serum iron level. A low estimate never rules out a serious ingestion.
What you enter
- Number of tablets ingested
- Iron salt per tablet (mg)
- Iron salt
- Body weight (kg)
How this is calculated
- Formula
- elemental mg = tablets x mg salt/tablet x percent elemental (sulfate 20%, gluconate 12%, fumarate 33%); mg/kg = elemental / weight.
Iron poisoning. Merck Manual Professional Version; and Yuen HW, Becker W. Iron Toxicity. StatPearls. (NBK459224.) Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.