❤️ Health
Do I sleep enough?
Compare your nightly sleep to age-specific recommendations.
How much sleep do you really need?
The National Sleep Foundation and WHO recommend 7–9 hours for adults aged 26–64, but the actual average varies by country: Japanese adults sleep 6.3 hours (the least among OECD nations), while New Zealanders average 7.5 hours.
Sleep recommendations by age (National Sleep Foundation)
- 14–17 (Teenagers): 8–10 hours
- 18–25 (Young Adults): 7–9 hours
- 26–64 (Adults): 7–9 hours
- 65+ (Older Adults): 7–8 hours
What happens with too little sleep?
Chronic sleep deprivation (under 6 hours consistently) is linked to increased risk of cardiovascular disease, obesity, diabetes, weakened immune function, and cognitive decline. Even 1 hour less than optimal can impact reaction time and decision-making.
Can you sleep too much?
Regularly sleeping more than 10 hours may indicate underlying health issues (depression, sleep apnea, chronic fatigue). Oversleeping itself is associated with higher mortality in studies, though the causality is debated — it may be a symptom rather than a cause.