● Normal haemoglobin levels vary according to age and gender. ● Infants and children up to 5 years of age: 9.5-14 g/dL. ● Children from 6-18 years: 10-15.5 g/dL. ● Men: 14-18 g/dL. ● Women: 12-16 g/dL. In elderly people and pregnant women, values are slightly less.