Iron, Ferritin & Anemia Reference Guide
Reference ranges for iron and ferritin come from large population studies (NHANES, WHO). They provide a framework to interpret your results, but your personal health context always takes priority. Iron and ferritin values vary by age and sex. These values are current as of 2026 and reviewed regularly to keep you informed.
When to use this calculator
- Technical calculations related to iron, ferritin, and anemia
- Students and healthcare professionals
- Verify lab results before clinical decisions
- Teaching and learning iron metabolism concepts
- Quick reference for medical projects
Calculation Example
- Hb 12, ferritin 30
- No anemia
How it works
1 min readNormal health reference ranges come from large population studies (NHANES, WHO, CDC). They vary by age, sex, ethnicity, and region. These are guidelines only; your personal medical history always takes priority.
How This Calculator Works
Iron and ferritin reference values vary by age and sex.
This calculator applies diagnostic criteria to your input values, checking typical ranges and alerting when results fall outside normal limits.
Normal Reference Ranges
| Parameter | Normal Adult Range |
|---|---|
| Blood Pressure | <120/80 mmHg |
| Resting Heart Rate | 60-100 bpm |
| Temperature | 36.1–37.2°C |
| Blood Oxygen (SpO2) | 95-100% |
| Fasting Blood Sugar | 70-100 mg/dL |
| HbA1c | <5.7% |
| Total Cholesterol | <200 mg/dL |
| LDL Cholesterol | <100 mg/dL |
| HDL Cholesterol | >40 (M) / >50 (F) |
Final Notes
This calculation is a reference guide only. For critical medical, financial, or legal decisions, consult a qualified healthcare professional. Values are current as of 2026 and reviewed regularly.
Frequently asked questions
What's a normal hemoglobin level?
Men: ≥13 g/dL. Women: ≥12 g/dL. Pregnant women: ≥11 g/dL. Lower levels indicate anemia.
What does ferritin measure?
Ferritin indicates your body's iron reserves. Levels below 30 ng/mL suggest low iron stores.
Can you have low iron without anemia?
Yes. Ferritin below 15 ng/mL indicates iron deficiency even if hemoglobin is normal. Early detection matters.
What's the recommended iron supplement dose?
Typical oral iron supplementation: 60–120 mg daily with vitamin C for better absorption.
When should I take iron supplements?
Best on an empty stomach for optimal absorption. Avoid coffee, tea, and dairy products within 2 hours.
What causes low iron levels?
Common causes include heavy menstruation, pregnancy, poor diet, GI bleeding, and surgery.
How long does iron supplementation take to work?
Initial improvements appear within weeks, but full iron restoration can take 3–6 months.
When should I see a doctor?
Consult a physician if values fall outside normal ranges, you have symptoms, or have a family history of cardiovascular or metabolic disease.