These free, reputable tools estimate your risk of developing breast cancer based on your health history, family history, and biology. None of them can tell you whether you will or won't get cancer, but they can help you have a smarter conversation with your provider about screening. Take your results to your next appointment.
The calculator most widely used in U.S. clinics. About eight questions — age, age at first period, age at first live birth, family history, and biopsy history — produce your estimated 5-year and lifetime risk of invasive breast cancer.
A more detailed model that factors in extended family history, hormone use, and breast density. Clinics often use it to decide whether a woman qualifies for supplemental MRI screening, typically at 20% or higher lifetime risk.
Plain-language guidance on hereditary breast and ovarian cancer. It helps you work out whether the pattern in your family — who was diagnosed, at what age, on which side — suggests genetic counseling and BRCA testing would be worthwhile.
An approachable walkthrough of every established risk factor, the ones you may be able to influence, like alcohol, activity, and weight after menopause, and the ones you can't, like age, dense tissue, and age at first period.
Risk calculators use averages from large studies. They can't see your dense tissue on a mammogram, your body, or your instincts. A low score is not permission to skip screenings, and a high score is not a prediction.
85% of women diagnosed have no family history.
Whatever your number, know what's normal for your body and keep your annual mammogram on the calendar.
A one-page printable version of these resources is available for events, workplaces, and waiting rooms.
View the printable handout