TMRCA Calculator

This program calculates the probabilities that any two male individuals shared a common paternal ancestor based on a comparison of the number of Y-DNA STR markers that they share in common versus the number of Y-DNA STR markers that were tested and compared between the two individuals.

The default mutation rate used for this calculator is 0.002. The formula used in this calculator is as described by Walsh et al 2001 (Walsh B. 2001. Estimating the time to the most recent common ancestor for the Y chromosome or mitochondrial DNA for a pair of individuals. Genetics, 158(2):897-912).

This program is a free public service powered by Genebase.

Total number of markers compared Number of markers that match Mutation rate