Differences in cM on Ancestry and gedmatch,

[strictlysnoopy]

   
    I have a match with a cousin on both Ancestry and Gedmatch. Can somebody explain why there is a difference in cm results. Ancestry gives us a
29cm Gedmatch on the one to many says 44.1 cm largest 18.3 smallest 4.7.

     We cannot at the moment find a common ancestor so with these results can somebody tell me what is our relationship

    Thank you

[Ruskie]

Many people use this tool:
https://dnapainter.com/tools/sharedcmv4

[Gadget]

Using an algorithm called Timber, Ancestry weights the results to allow for segments that are shared by many people who have ancestors from common geographical areas. See for e.g:

https://whoareyoumadeof.com/blog/what-is-unweighted-shared-dna-on-ancestry/

The unweighted cMs can be found in Ancestry by clicking on the details of the shared DNA in the details of a relative. The discrepancy is usually greater with  lower shared cMs.

e.g      I've just clicked on a random match with a weighted shared cM of 49. The unweighted amount is 59cMS.
 
Add -you can then use the link that Ruskie gives with both results.

[Gadget]

The red arrow, in the snip below, indicates where to click for the unweighted amount:

[strictlysnoopy]

     Awesome Gadget, thank you so much.   'till the next time 

    Regards
   
     Suzanne

[LizzieL]

Ancestry now cuts off at 8. How many segments do you match.
I have 6th cousin who I don't match according to Ancestry, but do on Gedmatch,

[strictlysnoopy]

 Really new to this DNA, LizzieL. 

    so I will just say that this cousin is a match to 11 other cousins but her ancestors are from another branch which we haven't found.  On Ancestry she is well below my 11 as a distant 4th-6th cousin but on Gematch she is way above all the others.

    best of luck with your research