First and Last Born in a Cohort
The exact opening and closing days of any cohort, and how many days it ran.
Generation Beta opens in 2025 and closes in 2039 — 15 years, 5,479 days, and about 1.98 billion babies born inside that window at current birth rates.
First and Last Born in a Cohort
Frequently asked
Is the First and Last Born in a Cohort 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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