Have you seen people mentioning “shared centimorgans” or seen someone say “shared cMs” and wonder how on earth they accessed that information on their Ancestry DNA results? You are not alone. I am embarrassed to say that I had been using the site for more than a year before I figure it out. Actually, it might have even been longer than that!
How to Find Shared Centimorgans on Ancestry DNA
- Click on your list of DNA matches, which should bring up the page will all of your matches listed.
- Click on the green “VIEW MATCH” button, which will bring up the individual match page.
- Lastly, click on the little grey “i” under the predicted relationship.
- A little box should pop up that tells you the amount of cMs that you share with your match.
The image above should help you, if you are having trouble spotting where to click.
Why is the Amount of Shared DNA Important?
I am so glad that you asked. The reason that it’s good to know how much DNA you share with someone is because this information can help you figure out exactly how you are related. There are ranges for the average amount of DNA that people of different relationships share with each other, and so if you know the shared cMs, you can figure out how you are, and how you are not, related.
Once you know the amount of shared DNA, you can take a peek at their tree, if they have one, and you will know how far back in their tree (and your tree) you need to look for your common ancestor.
Sometimes, people are surprised by the amount of DNA that they share with their matches. I know that I definitely was surprised by the things that I learned about my own family.
I have learned so much from this little trick, and it has been extremely handy for family tree research. If you have already done your DNA test and have a question about shared DNA, I would love to hear from you in the comments!
Thank you for stopping by, it is much appreciated 🙂