Daily How Much

Most teens need 8–10 hours of sleep a night, with many doing best near nine hours of regular, good-quality rest.

Babies need around 11 to 17 hours of sleep per day, with total hours gently dropping as age, feeding habits, and development change.

Most teenage athletes need 8–10 hours of night sleep to recover, grow, and stay sharp in both school and sport.

Teenage girls thrive on 8–10 hours of sleep each night, with steady routines and smart habits helping them stay healthy and ready for the day.

Most teenagers need around 8 to 10 hours of sleep a night to stay healthy, learn well, and stay safe.

The best sleep range with PCOS is usually 7 to 9 hours a night, adjusted to your age, symptoms, and daytime energy.

Most healthy adults need about 49–56 hours of sleep a week, or 7–8 hours each night, with children and teens needing more.

A good sleep score is 80–89 on most wearables, with 90–100 marked as excellent.

Adults generally need REM sleep for about a quarter of nightly sleep, which works out to roughly 90–120 minutes when you sleep 7–9 hours.

Most nursing mothers do best with 7–9 hours of total daily sleep, often in chunks, to support recovery, mood, and milk supply.