Current consensus from the broadest range of scientific disciplines can be summarized in these recommendations:

• Newborns (0-3 months): Sleep range narrowed to 14-17 hours each day (previously it was 12-18)
• Infants (4-11 months): Sleep range widened two hours to 12-15 hours (previously it was 14-15)
• Toddlers (1-2 years): Sleep range widened by one hour to 11-14 hours (previously it was 12-14)
• Preschoolers (3-5): Sleep range widened by one hour to 10-13 hours (previously it was 11-13)
• School age children (6-13): Sleep range widened by one hour to 9-11 hours (previously it was 10-11)
• Teenagers (14-17): Sleep range widened by one hour to 8-10 hours (previously it was 8.5-9.5)
• Younger adults (18-25): Sleep range is 7-9 hours (new age category)
• Adults (26-64): Sleep range did not change and remains 7-9 hours
• Older adults (65+): Sleep range is 7-8 hours (new age category)