Besides bedtime rituals, the average amount of sleep needed for each age group changes. The typical amount of REM sleep, also varies over the years.
| Age Group |
Considered Amount of Sleep Needed (1) |
Average % REM Sleep |
| Infants | 16 - 18 hrs/day | 50% |
| Toddlers | 10-12 hrs/night; 1-2 hrs/day |
35% |
| Children | 9-10 hrs/night; infrequent naps |
|
| Teenagers | 9.5 hrs/night | |
| Adults | 7-8.5 hrs/night | 20-25% |
| Elders | 6.5 hrs/night; 1 hr nap |
(1) Summarized from MANY sources. See our references page for further reading.
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