Birth Timing Probability
The odds of being born into a given generation, month or day — and how many people share each of those with you.
A 15-year cohort contains about 1.96 billion people, roughly 363,000 born on any given day and 4.2 born in the same second as anyone else.
Birth Timing Probability
Frequently asked
Is the Birth Timing Probability 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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