Sibling Age Gap Planner
What a given age gap means for cost, childcare overlap and which generation each child lands in.
A three-year age gap produces two years of overlapping paid childcare and ten years with both children at school together, which is the trade most families are actually making.
Sibling Age Gap Planner
Frequently asked
Is the Sibling Age Gap Planner 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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