Library/Blood count/Hemoglobin/12.5

Hemoglobin of 12.5 g/dLWhat it means, and what usually happens next

12.5g/dL Hemoglobin
In range for women, low for men
81112131617.5

A hemoglobin of 12.5 g/dL is in range for a non-pregnant woman (12.0 or above) but under the WHO's 13.0 g/dL line for men.

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Hemoglobin12.5g/dL
In g/L125
The usual rangeabout 12.0 to 15.5 g/dL in women and 13.0 to 17.5 g/dL in men

What usually happens next

For a man it counts as mild anaemia, and the MCV and ferritin are the next things to read.

For a woman it's in range, at the lower end.

When a hemoglobin can read wrong

Dehydration concentrates the blood and pushes hemoglobin up; a lot of IV fluid or pregnancy dilutes it. Smoking and altitude raise it, and right after sudden blood loss it can still look normal for a few hours.

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Questions

Is a hemoglobin of 12.5 g/dL normal?

A hemoglobin of 12.5 g/dL is in range for a non-pregnant woman (12.0 or above) but under the WHO's 13.0 g/dL line for men. The usual range is about 12.0 to 15.5 g/dL in women and 13.0 to 17.5 g/dL in men.

What is 12.5 g/dL in g/L?

125 g/L. Labs in different countries print Hemoglobin in different units; the meaning is the same.

What is a dangerously low hemoglobin?

The WHO calls under 8.0 g/dL severe anaemia. How urgent it is depends on symptoms and how fast it fell, so a result that low is a call to your doctor the same day.

Worked out by LifeFrom from the WHO's 2024 haemoglobin guideline, and not yet reviewed by a clinician. For your own understanding: only a lab test, read by your clinician, diagnoses anything.