Sleep Need by Age
Recommended hours of sleep per night by age bracket, based on the NSF consensus and recent meta-analyses.
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Recommended hours of sleep per night by age bracket, based on the NSF consensus and recent meta-analyses.
How to use Sleep Need by Age
- Open the toolNo signup and nothing to install; it works as soon as the page loads.
- Set “Age (years)”
- Read the resultChange any input and the result is recalculated immediately.
Worked example with the defaults
- RECOMMENDED SLEEP · For age 30
- 8 hours
Nothing you enter leaves your device
All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.
That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.
What this tool does not do
Sleep Need by Age only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.
It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.
Frequently Asked Questions
- I can function fine on less.
- Functioning is not the same as thriving. Sleep deprivation builds up, and many cognitive costs only show up in long-term memory and immune function.