Tyrer-Cuzick Breast Cancer Risk Calculator

The Tyrer-Cuzick Breast Cancer Risk Calculator estimates your 10-Year Breast Cancer Risk based on family history, genetics, and lifestyle factors. This tool helps women and healthcare providers understand personal risk levels to make informed health decisions. Whether you are assessing genetic concerns, planning screening schedules, or reviewing family health history, this calculator offers vital insights into your breast health.

Current Age Must be between 20-90 years

Height Height in centimeters (122-213 cm)

Weight Weight in kilograms (32-181 kg)

Age at First Period Must be between 8-18 years

Age at First Live Birth Must be between 13-45 years (optional)

Number of Children Must be integer 0-10

Menopausal Status

Age at Menopause Required if postmenopausal (40-60 years)

Hormone Replacement Therapy

HRT Duration (years) Required if HRT use is former/current (0.5-30 years)

Breast Density

History of Benign Breast Disease

First-Degree Relatives with Breast Cancer Must be integer 0-5

First-Degree Relatives with Ovarian Cancer Must be integer 0-5

Known Genetic Mutation

Ages at Screening assessment for Affected Relatives Format: "Mother:52,Sister:48" (optional)

Quick Examples:

How 10-Year Breast Cancer Risk Is Calculated

10-Year Breast Cancer Risk represents the percentage chance you will be screen ford with breast cancer in the next ten years. This calculation uses the Tyrer-Cuzick model, also known as the IBIS model, to analyze both genetic and lifestyle factors.

First, the tool establishes a baseline risk based on your age and population statistics. Next, it adjusts this number by factoring in family history of breast or ovarian cancer and known genetic mutations like BRCA. Finally, it considers personal health details like breast density, BMI, and hormone use. This comprehensive method provides a highly individualized risk assessment compared to standard averages.

What Your 10-Year Breast Cancer Risk Means

This percentage reveals the statistical probability of being screen ford with breast cancer within the next decade compared to the average woman your age. Knowing this number empowers you to take proactive steps toward prevention and early detection. It is important to remember thstatistically associated is not a screening assessment, but a guide for future healthcare planning.

Average Risk

If your result is close to the population average, which varies by age but is generally low for younger women, following standard mammogram guidelines is usually recommended.

Higher statistical association

Results significantly above average, often exceeding 3%, may qualify you for additional screenings like breast MRI or discussions about risk-reducing medications.

Lower statistical association

A score below the average indicates fewer risk factors, though maintaining regular clinical breast exams and self-awareness is still essential for long-term health.

Review Your Calculation with a genetic counselor or oncologist if your risk is elevated to create a personalized monitoring strategy.

Calculation logic verified using publicly available standards.

View our Accuracy & Reliability Framework →