About CousinChart

CousinChart.com is a free set of tools that untangle family relationships. Confused about what to call your cousin's kid, whether you're second cousins or once removed, or how a DNA match fits your tree? Our tools answer it in seconds — with a clear label and a visual family chart you can name, add photos to, and download.

What you can do here

• Relationship Calculator — work out any blood relationship and see it on a chart with everyone's names and faces
• DNA Match Calculator — turn shared centimorgans (cM) from a DNA test into the relationships that are actually possible
• What Do I Call…? — the in-law and step-family terms the cousin math doesn't cover
• Printable Family Trees — blank charts to print, or add circular photos for a keepsake tree

Free, private, and accurate

Every tool is free with no signup. Anything you type or any photo you add stays in your browser — nothing is uploaded to us. And accuracy matters: our relationship math follows standard genealogical rules, and our DNA ranges come from the widely-cited Shared cM Project.

Why we built it

Family gatherings are full of "wait, how are we related?" moments — and the existing charts online are clunky, static, and a little joyless. We wanted the version that's instant, visual, and actually fun to share. Got an idea or a correction? We'd love to hear from you on our contact page.