How much sleep do I actually need?
Last updated September 3, 2026.
The CDC's floor for adults is at least 7 hours - most adults do best at 7 to 9, teens need 8 to 10, school-age kids 9 to 12. The personal test beats the population number: you have enough when you wake without an alarm, function without caffeine heroics, and do not crash on weekends. Retire the myth: genuine short sleepers are rare, and chronic sub-7 sleep ties to heart disease, weight gain, mood problems, and impaired driving. Consistency is half the answer - same hours, same times.
What to do
- Run the no-alarm week. On vacation or a free week, note where your sleep naturally lands.
- Watch the weekend crash. Needing to catch up means weekday debt.
- Fix the wake time first. A constant wake time drives bedtime automatically.
- Protect teens' sleep. 8 to 10 hours - early school starts fight their biology.
Related questions
- What is sleep debt?
- Can you catch up on sleep on weekends?
- Why can't I fall asleep even when I'm tired?
- Why do I wake up at 3am every night?