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Calcimator

Iron Supplement Calculator

Calculate elemental iron dosing by supplement type and deficiency severity, with duration estimates.

Inputs

Results

Elemental Iron/Day

120 mg

Tablets per Day

2

Treatment Duration12 weeks
Elemental (%)0.2%
How to Use This Calculator
  1. Select your supplement type - ferrous sulfate (20% elemental iron), ferrous gluconate (12%), or ferrous fumarate (33%).
  2. Select your iron deficiency severity (mild, moderate, severe).
  3. Input your body weight in kg - the target dose is scaled proportionally to your weight.
  4. Review the Elemental Iron/Day and Tablets per Day outputs, plus the Treatment Duration in weeks.
  5. Check the Elemental (%) output to see how much of your chosen supplement's mass is actually elemental iron.

How the result changes with Body Weight (kg)

Body Weight (kg)Elemental Iron/DayTablets per Day
4781 mg2
90154 mg3
141242 mg4
183314 mg5

What each input means

Supplement Type
1 = Ferrous sulfate (20% elemental), 2 = Ferrous gluconate (12%), 3 = Ferrous fumarate (33%)
Deficiency Level
1 = Mild (low ferritin), 2 = Moderate (low Hgb), 3 = Severe (symptomatic anemia)
Body Weight (kg)
Your body weight in kilograms (used to adjust dosing)

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Supplement Type = 1, Deficiency Level = 2, Body Weight (kg) = 70 = 3 input(s) provided
  2. Calculate Elemental Iron/Day
    Elemental Iron/Day
    120 = 120
  3. Calculate Tablets per Day
    Tablets per Day
    2 = 2

Engine last updated . Checked against 3 independently-derived tests — how we verify calculators.

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