Blood health
Haemoglobin Levels by Age: Normal Ranges for Men and Women
Reviewed by a qualified clinician · analysed at UKAS-accredited UK labs (ISO 15189)
Last reviewed August 20266 min read
Every Helvy guide is written by our health editors, then checked by a qualified clinician before it goes live and re-checked as the science moves. We name clinical roles, not individuals, until each reviewer has agreed to be credited publicly. This is wellness guidance to help you understand your own data, not a diagnosis.
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UK labs band haemoglobin by sex, not by age. Adult men are usually read against 130 to 170 g/L, adult women against 120 to 150 g/L. What rises with age is your chance of sitting below that line. Anaemia affects about 4% of adults in England, and roughly 14% to 16% of over-65s.
Not sure which markers you need? Build your test →You have climbed the stairs and you are out of breath. Your face looks washed out in the mirror. Your blood test came back with a haemoglobin of 124, and you are 67. So you search for a chart, hoping one exists for your age.
There is no such chart in UK practice. This guide explains what your lab actually compares you against, how the odds shift after 65, and what to check when a number sits low.
1. Does the haemoglobin range change with age?
Not in adults. UK labs split the adult range by sex, and then hold it steady from your twenties to your nineties. A 25-year-old man and an 85-year-old man are read against the same line.
Children are the exception. Their ranges do shift by age band, which is why age-banded charts exist at all. Those charts are paediatric. They do not apply to you.
The World Health Organization looked hard at this in 2024. It found too little evidence to set a separate cut-off for adults over 65, so it kept one adult threshold. That decision is the reason your report has no age column.
2. What are normal haemoglobin levels in g/L?
Haemoglobin is the protein in your red blood cells that carries oxygen. UK labs report it in grams per litre, written g/L. Older reports use g/dL, where 130 g/L becomes 13.0 g/dL.
| Group | Usual lab range | Anaemia below |
|---|---|---|
| Men, 18 and over | 130 to 170 g/L | 130 g/L |
| Women, not pregnant | 120 to 150 g/L | 120 g/L |
| Women, pregnant | Managed by your midwife or GP | 110 g/L |
Labs differ by a few points, so read your own report first. Our guide to reference ranges explains why two labs can flag the same result differently.
One detail is worth knowing. A 2024 pooled analysis of international data put the statistical fifth centile for men at 134.9 g/L, above the 130 g/L cut-off still in use. So a man at 132 is inside the printed range while sitting near the bottom of it.
3. Why does low haemoglobin get more common after 65?
The line stays put. Your odds of falling under it do not. A 2025 cohort study in the British Journal of General Practice looked at 14.2 million patient records in England.
| Group | Share with anaemia |
|---|---|
| All adults | 4.1% |
| Women, all ages | 5.1% |
| Men, all ages | 3.1% |
| Women over 65 | 13.8% |
| Men over 65 | 16.1% |
Read the shape of that. Women carry more anaemia across adult life, largely because of periods and pregnancy. After 65 the pattern flips, and men overtake them.
4. What can a low haemoglobin not tell you?
Why it is low. Haemoglobin tells you that oxygen delivery has slipped. It says nothing about the cause, and the causes are not alike.
Haemoglobin is measured as part of a full blood count, the standard NHS panel. The NHS is plain about where the number comes from.
“The GP will usually do a blood test to find out if the number of red blood cells you have is normal. This is called a full blood count (FBC) test, which also looks at other types of cells in your blood.”
— NHS, Iron deficiency anaemia
Three follow-on markers do most of the explaining.
- Ferritin shows your iron stores, and it falls first.
- Vitamin B12 and folate are needed to build red cells at all.
- MCV, the average size of your red cells, points to which of those is short.
The order matters. Iron stores empty long before haemoglobin drops, so a normal haemoglobin can sit on top of an emptying tank. Our guide on low ferritin with a normal haemoglobin covers that gap in full.
5. What can a high haemoglobin mean?
Often something simple. Being short of fluid concentrates your blood, so a reading taken while dehydrated can look higher than your true level.
Living at altitude raises it too, and so does smoking. Sleep apnoea is another common reason, because broken breathing at night lowers overnight oxygen. Our sleep apnoea guide covers that link.
A persistently high result should be looked at by a qualified clinician. Do not treat one raised reading as an answer, and do not treat it as a crisis either.
6. Which test measures what sits behind your haemoglobin?
Be clear on one thing first. Helvy’s home tests do not report haemoglobin. That number comes from a full blood count, which your GP arranges. What our panels measure is the layer underneath it.
The Vitamins & Minerals panel (£159) runs a full iron workup, covering iron, ferritin, transferrin, transferrin saturation and total iron binding capacity. It reads those alongside vitamin B12, folate, vitamin D and magnesium.
That is the set of markers that explains a borderline or falling haemoglobin. It is not a full anaemia screen on its own, because a full picture also needs a blood count and a clinical judgement.
Want a broader first look instead? The General Energy & Wellness panel (£149) reads B12 and vitamin D with thyroid, cortisol, kidney and liver markers. If you are unsure, the build-my-test tool walks you through it, and the energy and fatigue hub covers the other causes worth ruling out.
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Find out what sits behind the number
Helvy’s home blood tests report your iron and vitamin markers with plain-English context, so a borderline result never leaves you guessing. Samples are processed by UKAS-accredited UK labs.
Frequently asked questions
What is a normal haemoglobin level by age in the UK?
UK labs do not band adult haemoglobin by age. They band it by sex. Men are usually read against 130 to 170 g/L and women against 120 to 150 g/L, at every adult age. Age-banded charts you find online are either paediatric or population averages.
Is a haemoglobin of 124 g/L normal at 67?
For a woman that sits inside the usual range, close to the bottom. For a man it sits below the WHO anaemia cut-off of 130 g/L. Age does not change either line. If you also feel tired or breathless, take the result to your GP.
Does haemoglobin fall as you get older?
Low haemoglobin gets more common with age. In England, anaemia affected 4.1% of adults in 2019, rising to 13.8% of women and 16.1% of men over 65. That is a rise in risk, not a change in what counts as healthy.
What is the difference between g/L and g/dL?
They are the same measurement on different scales. Divide g/L by 10 to get g/dL, so 135 g/L is 13.5 g/dL. UK reports usually use g/L. Older UK reports and most US sources use g/dL.
Can your haemoglobin be normal while your iron is low?
Yes, and it is common. Iron stores empty before haemoglobin drops, so ferritin can be low while the blood count still looks fine. That stage is where tiredness often starts, and it is why ferritin is worth measuring.
Does Helvy measure haemoglobin?
No. Haemoglobin comes from a full blood count, which your GP arranges. Our panels measure the markers that explain it, including ferritin, iron, transferrin saturation, vitamin B12 and folate.
Related guides
Full Blood Count (FBC) Explained
The NHS panel your haemoglobin comes from, and what else it reports.
Anaemia Blood Test UK
The three types classified by cell size, and the markers behind each.
Ferritin Blood Test UK
Iron stores, UK ranges, and why ferritin falls before haemoglobin.
MCV Blood Test UK
Why red cell size points to which shortfall is driving a low result.
Vitamin B12 Levels by Age
Another marker with one adult cut-off and a risk that climbs with age.
Energy and Fatigue Hub
The blood markers worth checking when sleep is not the problem.
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