Child Sleep Calculator
Work backwards from wake-up time to the bedtime that actually delivers enough sleep.
A seven-year-old needs about 10 hours of sleep, so a 7am wake-up means lights out by 21:00, bedtime around 20:40 allowing 20 minutes to fall asleep, and screens off by 20:00.
Child Sleep Calculator
Frequently asked
Is the Child Sleep Calculator free?
Yes. Every tool on AlphaBetaMinds is free, needs no account and has no usage limit.
Does this tool store what I type?
No. It runs entirely in your browser. Your inputs are never sent to our server, and nothing is logged.
How accurate is it?
It uses the McCrindle generation boundaries (Gen Alpha 2010–2024, Gen Beta 2025–2039) and UN World Population Prospects vital rates. Sources and formulas are on our methodology page.
Can I use the result in an article or report?
Yes, with a credit and a link back to this page. See our terms of use for the full licence.
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