Sleep vs Screens Calculator
How evening screen use maps against recommended sleep for a child's age.
A nine-year-old sleeping 8.5 hours is 1.5 hours short of the 10 recommended for that age — about 10.5 hours a week — and 45 minutes of pre-bed screen use is the most consistently implicated factor.
Sleep vs Screens Calculator
Frequently asked
Is the Sleep vs Screens 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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