The normal amount-or concentration- of haemoglobin is at least 13g/dl(13 grams of haemoglobin per decilitre of blood-a decilitre=100ml) for men, at least 11.5g/dl for women, at least 11g/dl for pregnant women. The values for children vary by age-ask your doctor for more advice. If your haemoglobin level is low and your red cells are small, you may have iron-deficiency anaemia. You may need to have other blood tests e. g. a ferritin test which can give an idea of how much iron is in your body.
Attribution: BUPA