Generation Length Calculator
How long each named cohort runs, and how the length has changed over a century.
Named generations have been getting shorter: the Greatest Generation ran 27 years and the Silent 18, and every cohort since has been defined in a window of 15 to 19 years.
Generation Length Calculator
Frequently asked
Is the Generation Length 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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