About CousinChart
Last updated: September 23, 2026
CousinChart works out exactly how two people in a family are related — and draws it, so you can actually see it. First cousin once removed, second cousins, half cousins, all of it.
The person behind this
I'm Joan Ramos. I build free web tools, which started by accident with a printables site called Mary's Printables.
That site was supposed to be small. Then the emails came — a teacher who'd found precisely the worksheet she needed, a parent using a chart with a struggling child, someone printing something at the last minute. What struck me was that none of it was about how the site looked. It was about something useful being there, working straight away, and not asking for anything first.
Every site I've built since follows from that.
The problem this solves
Every family has this argument. Someone says "second cousin," someone else says "first cousin once removed," a third person says they're the same thing, and nobody can explain it — including, for years, me.
The answer is genuinely simple. The catch is that it's nearly impossible to hold in your head from a paragraph of text. It's a picture, not a sentence. Every explanation online is either a wall of words or a chart so dense you'd need a second chart to read it.
So this one draws it.
What you get
- The relationship calculator — tells you the term and shows you the path between two people
- A visual chart, because seeing the connection is what makes it finally click
- Printable charts for reunions, family trees and anyone who'd rather have it on paper
- Plain explanations of what "removed" actually means, and why half cousins are their own thing
- Country differences covered — the words genuinely change depending on where you are, and almost nobody mentions that
- Nothing to install, no account, works on a phone
Your family stays yours
Worth saying plainly: what you type never leaves your browser. Names and relationships are personal. I don't upload them, don't store them, and couldn't look yours up if I wanted to.
What this isn't
It isn't proof of anything. Relationship terms are conventions, not records — so please don't use a chart here for anything legal, immigration or inheritance-related, which needs documents. And for questions about inherited conditions, that's a doctor or a genetic counselor, not a website.
Corrections
If a term is wrong for your country, or a chart doesn't match how your family describes itself, I'd genuinely like to know. [email protected] reaches me directly.
CousinChart is one of a family of free tools I run at FriendlyApps.