Little tools
Everything here is arithmetic you could check by hand. Each tool states the formula it uses.
- Full-Name Estimator how many share yours
- Name Matcher what fits your surname
- How Rare Is It? a name against 331M
- Compare Two Names side by side
- Adult Height mid-parental estimate
- First-Year Costs add it up
- Birth Plan Worksheet tick, print, hand over
The pregnancy tools give calendar estimates from dates you type in, using formulas in ordinary clinical use. They are not medical advice — only a clinician who knows your history can tell you what applies to you.
Where this page gets its numbers
- Counts, ranks and shares: U.S. Census Bureau, 2020 Census tabulations of first and last names occurring 100 or more times. Percentages, bands and groupings are our own arithmetic — the conclusions are ours, not the Bureau’s.
Below a hundred people we publish no figure at all — the same threshold the Census Bureau applies to us. What each source covers