Bedtime Drift Tracker
How far bedtime has slipped over a term, and what it costs across a school year.
A bedtime that has slipped from 20:00 to 21:15 costs about 6.3 hours of sleep a school week and 125 hours across a 20-week term — the equivalent of roughly 14 full nights.
Bedtime Drift Tracker
Frequently asked
Is the Bedtime Drift Tracker 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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