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Ferritin Range

Ferritin Range: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.

ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.

Ferritin Range

Your ferritinng/mL
Group (1 = 0–23 mo, 2 = 24–59 mo, 3 = 5–12 y, 4 = 13–19 y, 5 = 20–59 y, 6 = 60+, 7 = pregnant, 1st trimester)
Sex (1 = female, 2 = male)
Infection, inflammation or chronic disease present (1 = yes)
Iron deficiency cut-off (WHO 2020)
15ng/mL
WHO 2020 cut-offs (WHO guideline on use of ferritin concentrations to assess iron status); 1 ng/mL = 1 µg/LFerritin is an acute-phase protein: inflammation raises it, so the deficiency cut-off is higher. Lab reference ranges may differ — a doctor makes the diagnosisFerritin Range: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
WHO group
Adults 20–59 years
Iron overload risk cut-off
150ng/mL
Your ferritin vs WHO cut-offs
Within WHO cut-offs

More about: Ferritin Range

What it calculates

The “Ferritin Range” calculator computes Iron deficiency cut-off (WHO 2020) in ng/mL from 4 parameters: your ferritin (ng/mL), group (1 = 0–23 mo, 2 = 24–59 mo, 3 = 5–12 y, 4 = 13–19 y, 5 = 20–59 y, 6 = 60+, 7 = pregnant, 1st trimester), sex (1 = female, 2 = male), infection, inflammation or chronic disease present (1 = yes).

Used by professionals and patients to assess health metrics, dosages, and risks.

Example calculation

With parameters Your ferritin = 40 ng/mL, Group (1 = 0–23 mo, 2 = 24–59 mo, 3 = 5–12 y, 4 = 13–19 y, 5 = 20–59 y, 6 = 60+, 7 = pregnant, 1st trimester) = 5, Sex (1 = female, 2 = male) = 1, Infection, inflammation or chronic disease present (1 = yes) = 0 the result is 15 ng/mL (WHO 2020 cut-offs (WHO guideline on use of ferritin concentrations to assess iron status); 1 ng/mL = 1 µg/L).

How to use

  1. Enter your ferritin, group (1 = 0–23 mo, 2 = 24–59 mo, 3 = 5–12 y, 4 = 13–19 y, 5 = 20–59 y, 6 = 60+, 7 = pregnant, 1st trimester), sex (1 = female, 2 = male) and infection, inflammation or chronic disease present (1 = yes) — each field above is adjustable with a slider.
  2. Iron deficiency cut-off (WHO 2020) (ng/mL) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.

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