Newborns (1 – 2 month old) 10.5 – 18 hours

Babies (3 – 11 month old) 15 -16 hours

Infants (1 – 3-year-old) 12 – 14 hours

Preschoolers (3 – 5-year-old) 11 – 13 hours

Students (5 – 12-year-old) 10 – 11 hours

Adolescents (11 – 17-year-old) 8.5 – 9.25 hours

Adults 7 – 9 hours

Seniors 6 – 8 hours