Real Sleep Calculator

Sleep by age

Recommended sleep hours for every life stage

Newborn (0–3 months)

Includes naps

14–17 hours

Infant (4–11 months)

Includes naps

12–15 hours

Toddler (1–2 years)

Includes naps

11–14 hours

Preschool (3–5 years)

May include nap

10–13 hours

School age (6–12 years)

Consistent schedule

9–12 hours

Teen (13–17 years)

Delayed circadian phase

8–10 hours

Young adult (18–25 years)

Same as adults

7–9 hours

Adult (26–64 years)

4–5 sleep cycles

7–9 hours

Older adult (65+ years)

Lighter, fragmented sleep

7–8 hours

Source: National Sleep Foundation & American Academy of Sleep Medicine guidelines

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How much sleep do you need?

Sleep needs change dramatically across your lifespan. Newborns require up to 17 hours while healthy adults need 7–9 hours. These recommendations represent total sleep including naps for younger age groups.

For adults, 7–9 hours typically means 4–5 complete 90-minute sleep cycles. Use our sleep cycle calculator to find exact bedtimes, or the sleep debt calculator if you have been running short.

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