GEDmatch is providing relationship predictions on its site for the first time ever. Find out how you’re related to the matches you see without leaving the page.
Update Feb. 22, 2022: A newer relationship predictor, which is the first and only predictor to use data from a peer-reviewed source, is now available. I hope to update the tools at GEDmatch with the new data. The new tools now available are as follows:
- Traditional relationship predictions
- A double cousin relationship predictor (added Mar. 9)
- Relationship predictions to help validate known relatives (no population weights)
- Relationship predictions for X-DNA matches (ignoring atDNA, added Jun. 29)
GEDmatch.com has just updated its site with relationship predictions. These new relationship predictions at GEDmatch are now available on the results page of the One-to-Many tool. Currently, the feature is limited to Tier 1 users on the One-to-Many – Full Version and only on the New site, i.e. not the Classic one. This is an exciting addition to the growing suite of tools available at GEDmatch, and includes the most accurate data available for relationship prediction. Here is the methodology for generating the relative probabilities between relationships. The new relationship predictions at GEDmatch are based on this tool.
To see relationship predictions at GEDmatch, simply click on the total shared centiMorgans (cMs) that you share with your match. This is in the column labeled Total cM under the Autosomal section.
You can pick a value such as 2,069.9 cM, shown below.
A window will then pop up showing you all of the possible relationship types as well as the probabilities for each one. Here’s what it looks like for 2,070 cM.
Other Recently Added Tools
GEDmatch has also recently integrated tools from the fabulous site Genetic Affairs. Well known for AutoClusters, the first tool to automatically sort your DNA matches into groups, Genetic Affairs has developed many other useful tools. AutoClusters and AutoSegment are both now available at GEDmatch with a Tier 1 subscription.
If you have started using these tools already, I highly recommend them. And I do hope you enjoy the new relationship predictions at GEDmatch.
Here’s a full list of the relationship prediction tools available on this site:
- The only relationship predictor that gives probabilities based on the Are Your Parents Related tool at GEDmatch
If you had access to the most accurate, free, relationship predictor, would you use it? Feel free to ask a question or leave a comment. And make sure to check out these ranges of shared DNA percentages or shared centiMorgans, which are the only published values that match peer-reviewed standard deviations. Or, try a tool that lets you find the amount of an ancestor’s DNA you cover when combining multiple kits. I also have some older articles that are only on Medium.