Check where your hemoglobin sits. This free anemia checker compares your Hb result to common reference thresholds for men, women and pregnancy — informational only, and never a substitute for a doctor’s diagnosis.
⚠ Informational only — not a diagnosis. This compares a hemoglobin (Hb) value you enter to common reference thresholds. Anemia has many causes and is diagnosed by a doctor with blood tests. A value near a threshold doesn’t confirm or rule out anything — please see a healthcare professional.
Your hemoglobin
g/dL
Find “hemoglobin” or “Hb” on your blood-test report. Use your own lab’s reference range where given — it’s the most accurate for you.
Vs anemia threshold
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Select a group and enter your Hb
Your result
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Group
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Threshold (below = low)
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Interpretation
Ask your doctor
Thresholds follow common WHO reference values for adults; children and other groups differ, and labs vary. Being below a threshold suggests it’s worth a conversation with your doctor — it isn’t a diagnosis.
Use this free anemia risk calculator to see where a hemoglobin result sits against common reference thresholds. Choose your group and enter your hemoglobin (Hb) for an at-a-glance, informational comparison.
Important: this tool is informational only and is not a diagnosis. It compares a hemoglobin value you enter to common thresholds — it does not assess symptoms or causes. Anemia has many causes and is diagnosed by a doctor with blood tests. A result near a threshold doesn’t confirm or rule out anything.
What this anemia checker shows you
An anemia checker compares your hemoglobin (Hb) — the protein in red blood cells that carries oxygen — against the threshold below which anemia is generally considered, for your group. It reports whether your value is below or at/above that threshold, in g/dL or g/L.
Common hemoglobin thresholds
Group
Anemia if Hb below
Adult men
13.0 g/dL (130 g/L)
Adult women (not pregnant)
12.0 g/dL (120 g/L)
Pregnant
11.0 g/dL (110 g/L)
These follow common WHO reference values for adults. Children and some other groups use different thresholds, and laboratories vary — always use your own report’s range where given.
What hemoglobin and anemia mean
Anemia means having too little hemoglobin or too few healthy red blood cells to carry enough oxygen. It’s a sign, not a single disease — causes range from low iron or vitamin levels to blood loss or chronic conditions, which is why a doctor’s assessment matters.
Common causes and risk factors
Low iron — the most common cause worldwide.
Low vitamin B12 or folate.
Blood loss — including heavy periods.
Pregnancy, which increases iron needs.
Chronic conditions affecting red blood cell production.
How to use the anemia checker
Select your group (man, non-pregnant woman, or pregnant).
Enter your hemoglobin result and choose g/dL or g/L.
Read the comparison. Below or at/above the threshold.
Take it to your doctor for what it means and any next steps.
Anemia & Hemoglobin FAQ
What hemoglobin level indicates anemia?
Common thresholds are below 13.0 g/dL for adult men, below 12.0 g/dL for non-pregnant women, and below 11.0 g/dL in pregnancy. These are general references — a doctor confirms anemia with blood tests.
What is hemoglobin?
Hemoglobin is the protein in red blood cells that carries oxygen around your body. Too little of it, or too few healthy red cells, is what anemia describes.
What causes anemia?
Common causes include low iron, low vitamin B12 or folate, blood loss (including heavy periods), pregnancy, and chronic conditions. Because causes differ, diagnosis and treatment need a doctor.
How do I convert hemoglobin units?
To convert g/L to g/dL, divide by 10 (so 135 g/L is 13.5 g/dL). The checker accepts both units and compares against the matching threshold.
My hemoglobin is below the threshold — what should I do?
A below-threshold result is a reason to see your doctor, who can repeat the test, look for a cause and advise on treatment. It isn't a diagnosis on its own, and many causes are very treatable.
Is the anemia risk calculator free to use?
Yes, this anemia risk calculator is completely free, needs no sign-up, and gives instant results in your browser. It is informational only and not a substitute for medical advice.
