Models You Can Run
Small tools for the arithmetic of kinship and networks
Everything runs in your browser; nothing you type is sent anywhere. Each model shows its formula, and the page around it explains the method with a worked example you can check by hand.
Cousin and relationship calculator
Second cousin once removed? Count the generations to a shared ancestor and get the name, the relatedness and the expected shared DNA.
Kinship terminology chart
One family tree, six classic systems: see which relatives Eskimo, Hawaiian, Sudanese, Iroquois, Crow and Omaha terms merge or split.
Network density calculator
Paste who is tied to whom and get density, degree, components and clustering, with every formula shown.
Pedigree collapse calculator
How many ancestor slots you have at each generation, when they outnumber everyone alive, and how much of your tree is repeats.
Section and subsection system simulator
Moieties, four sections and eight subsections: pick a person and see where their spouse, children and parents fall.