Sleep Calculator by Age
Use this sleep calculator by age to estimate recommended sleep duration for children, teenagers, adults, and older adults. Choose an age group to get a practical sleep range.
Find Sleep Need by Age
Select an age group to see the recommended sleep range.
How much sleep do you need by age?
Children and teenagers usually need more sleep than adults. Most adults need about 7 to 9 hours, teenagers usually need about 8 to 10 hours, and older adults often need about 7 to 8 hours.
Sleep Needs by Age Chart
| Age Group | Recommended Sleep | Planning Note |
|---|---|---|
| Preschool children | 10–13 hours | May include naps depending on routine. |
| School-age children | 9–12 hours | Helpful for learning, growth, and mood. |
| Teenagers | 8–10 hours | Often need more sleep than their schedule allows. |
| Adults | 7–9 hours | 7.5 to 9 hours is a useful calculator target. |
| Older adults | 7–8 hours | Sleep quality and timing may change with age. |
Sleep Calculator by Age FAQ
How much sleep do adults need?
Most adults need about 7 to 9 hours of sleep per night.
How much sleep do teenagers need?
Teenagers usually need about 8 to 10 hours of sleep per night.
How much sleep do children need?
Children often need more sleep than adults, with many school-age children needing about 9 to 12 hours.
Do sleep needs change with age?
Yes. Sleep needs are generally higher in childhood and adolescence and become more stable in adulthood.
Is this calculator medical advice?
No. It is a general educational tool.