What are my chances of getting breast cancer if no one in my family has it?

Can estimate but ...: The gail model which is available on the nci website is a good way to assess "relative" risk but will not tell you if someone is going to get breast cancer. The majority of patients diagnosed don't have a family history. The number one risk factor is being female and having breast tissue. This is the reason for population screening via bse, cbe, & mammography.