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CION Cancer Clinics
Haemoglobin levels: what is normal for your age and sex | CION Cancer Clinics
For adults, haemoglobin counts as low below 13 in men and below 12 in women who are not pregnant, measured in g/dL. Children and pregnant women have lower cut-offs. Your lab prints its own range, which may differ slightly, and a single result is always read alongside your symptoms, your other blood counts and a repeat test. This guide shows the cut-offs by age and what to do next. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- What haemoglobin level counts as normal?
- Below which level is haemoglobin low, by age and sex?
- Why is normal different for a child, a woman and a man?
- What do the words next to haemoglobin mean?
- What do families often get wrong about haemoglobin?
- What usually happens after a low haemoglobin result?
- How low is too low, and what can this table not tell you?
- Common questions about haemoglobin levels
The short answer
What haemoglobin level counts as normal?
For adults, the World Health Organization counts haemoglobin as low when it is below 13 in men and below 12 in women who are not pregnant, measured in g/dL. Children, teenagers and pregnant women have their own, lower cut-offs, set out in the table below.
Why your report may show a different range
Every laboratory prints its own reference range next to your result. It depends on the machine, the method and the group of healthy people the lab measured. So one lab may call a borderline result normal and another may flag it. Read your result against the range printed on your own report first, then use this page to understand what it means.
What haemoglobin actually is
Haemoglobin is the protein inside red blood cells that carries oxygen from your lungs to the rest of your body. When it is low, your organs get less oxygen. That is why it often shows up as tiredness or breathlessness on the stairs.
One number is a starting point
A single result is never read alone. Your doctor looks at it alongside how you feel, your other blood counts and, often, a repeat test.
This page explains cut-offs. It cannot tell you why your own haemoglobin is low or high.Threshold table
Below which level is haemoglobin low, by age and sex?
These are the WHO cut-offs, all in g/dL. Your lab's own range may differ slightly.
Who
Counted as low when below (g/dL)
Babies from six months up to age two
10.5
Young children aged two to four
11
Children aged five to eleven
11.5
Young teenagers aged twelve to fourteen
12
Women aged fifteen and over, not pregnant
12
Men aged fifteen and over
13
Pregnant women, first and third trimester
11; in the second trimester, 10.5
Not sure whether this applies to you?
Ask an oncologistWhy the line moves
Why is normal different for a child, a woman and a man?
The body's need for oxygen, its hormones and its blood volume all change across a lifetime.
Newborns and babies
A newborn starts life with a high haemoglobin, then it falls naturally over the first few months. That dip is expected. A baby's result must be read against a range for its exact age, which is why paediatric labs use age-specific tables.
Children and teenagers
The normal level rises slowly through childhood. Growth spurts use up iron quickly, so low haemoglobin is common in school-age children and in girls once periods begin.
Women
Monthly blood loss and lower levels of testosterone mean women's haemoglobin sits lower than men's. Heavy periods are one of the most common reasons it drops below the line.
In pregnancy
- Blood volume expands and dilutes the count
- The cut-off is lower, and lowest mid-pregnancy
Men and older adults
Men have a higher cut-off, so a man below it always needs an explanation. In older adults the same adult cut-offs apply. A low result is common with age, but it should not be written off as just age.
On your report
What do the words next to haemoglobin mean?
- Hb or HGB
- Short for haemoglobin. Most Indian labs report it in g/dL (grams in every tenth of a litre of blood).
- g/L
- The same measurement in grams per litre. Divide by ten to compare it with g/dL.
- Reference range or biological reference interval
- The range the lab considers usual for healthy people. It is not a diagnosis, and it can differ from one lab to the next.
- PCV or HCT
- Packed cell volume or haematocrit: the share of your blood made up of red cells. It usually moves up and down with haemoglobin.
- RBC count
- The number of red cells. It can be normal even when haemoglobin is low, which is itself a clue for your doctor.
- H or L flag
- A marker that your result sits above or below the lab's range. A flag says look closer. It does not say how serious it is.
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Commonly believed
What do families often get wrong about haemoglobin?
"Low haemoglobin is normal for Indian women."
It is common, but common is not the same as normal. A low result still has a cause, most often a shortage of iron or heavy periods, and it usually improves once that cause is found and treated.
"If I feel fine, the number does not matter."
When haemoglobin falls slowly, the body adjusts and you may feel almost nothing. That is exactly why a low result found by chance deserves a follow-up. How you feel and what the number shows are both part of the picture.
"Iron tablets will fix any low haemoglobin."
Iron helps only when the cause is too little iron. Low haemoglobin can also come from low vitamin B12 or folate, long-standing kidney disease, an inherited trait such as thalassaemia, or a bone marrow problem. Taking iron without knowing the cause can delay the right answer.
"A higher haemoglobin is always better."
A result well above your lab's range is also worth asking about. It can come from smoking, dehydration, lung disease or, less often, a blood disorder that makes too many red cells. Your doctor will decide whether it needs repeating.
If yours is outside the range
What usually happens after a low haemoglobin result?
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The result is checked against how you are
Your doctor asks about tiredness, breathlessness, periods, black stools, diet and any long-term illness. This tells them how quickly to act and where to look first.
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The rest of the blood count is read
The size of your red cells (MCV), the white cells and the platelets all sit on the same report. Together they narrow down the likely causes much more than haemoglobin alone.
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Tests to find the cause
Often an iron study such as ferritin, vitamin B12 and folate levels, kidney tests and sometimes a check for thalassaemia trait. The choice depends on what the first count showed.
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Treatment of the cause, then a repeat count
The repeat test shows whether treatment is working. If the count does not rise as expected, or other blood counts are also abnormal, your doctor may ask a haematologist, a blood specialist, to review it.
Being straight with you
How low is too low, and what can this table not tell you?
WHO grades low haemoglobin in non-pregnant adults as severe when it is below 8 (in g/dL). In pregnant women and young children, severe starts below 7. Between severe and the normal cut-off, the levels are graded as mild or moderate.
Speed matters as much as the level
A level that has drifted down over months can be surprisingly well tolerated. The same level reached in a few days, from bleeding for example, can make someone very unwell. The table cannot show you that difference. Only your history and repeat tests can.
When not to wait for an appointment
Whatever the number, go to the nearest emergency department or call 108 if low haemoglobin comes with chest pain, fainting, breathlessness at rest, black or bloody stools, or vomiting blood.
Who should ask for a closer look
A man below the cut-off, anyone whose count keeps falling, and anyone whose white cells or platelets are also abnormal should not settle for tablets and a repeat test alone. Ask whether a haematologist should see the report.
At CION, a haematologist reviews blood reports like yours and explains the next step in plain language.Questions we are asked
Common questions about haemoglobin levels
I am a woman and my haemoglobin is just under 12. Is that bad?
It sits just below the WHO cut-off for a woman who is not pregnant, which counts as mildly low. It is not an emergency on its own. It is still worth finding the cause, most often iron shortage or heavy periods, and repeating the count once that has been treated.
Is 12 normal for a man?
No. For men the WHO cut-off is 13, so 12 is low. Men do not lose blood monthly, so a low count in a man needs an explanation, and doctors often check for slow bleeding from the stomach or bowel. Show the report to your doctor rather than starting tablets on your own.
What is a normal haemoglobin for my child?
It depends on the exact age. The cut-off rises from 10.5 in babies to 12 in young teenagers, as the table shows. Newborns naturally run higher and then dip in the first months. Ask your paediatrician to read the result against a range for your child's age.
Why does my lab say normal when this page says low?
Labs set their own reference ranges from their machines and the people they tested, so the printed range can differ from the WHO cut-offs. Neither is wrong. If your result sits close to either line, mention it to your doctor, who will read it with your symptoms and other counts.
Does haemoglobin change with fasting or time of day?
Only a little. Fasting is not usually needed for a blood count. Dehydration can make haemoglobin look higher than it really is, and a lot of intravenous fluid can make it look lower. A single borderline result is often simply repeated before anything is decided.
Can diet alone bring my haemoglobin up?
If the cause is mild iron shortage, iron-rich food such as green leafy vegetables, pulses, jaggery-free balanced meals and meat or eggs helps, but it is usually slow. If the level is well below range, food alone is rarely enough. Your doctor will say whether tablets or other treatment are needed.
Is low haemoglobin a sign of blood cancer?
Usually not. Most low results come from iron shortage, blood loss, vitamin deficiency or long-term illness. A blood cancer is more likely to be considered when white cells or platelets are also abnormal, or the count keeps falling without a clear reason. Only further tests can rule it in or out.
When should I see a haematologist?
Ask for a referral if the cause is not clear after the first tests, the count does not rise with treatment, other blood counts are abnormal, or you are a man with an unexplained low result. A haematologist, a blood specialist, can plan the tests that find the cause.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Sources
- World Health Organization — Guideline on haemoglobin cutoffs to define anaemia in individuals and populations (2024)
- World Health Organization — Anaemia fact sheet
- NHS — Iron deficiency anaemia
- NHLBI — Anemia
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Haemoglobin 8, 9 or 10: how worried should you beWhat a moderate or severe result means and when to act todayMCV, MCH and RDW: reading the rest of your panelThe numbers beside haemoglobin that point to the causeWhich tests find the cause of low haemoglobinWhat your doctor is likely to order nextWhen low haemoglobin needs a haematologistSigns that a specialist should review your report
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