Assess Your Breast Cancer Risk Factors
This is not a diagnosis — it’s a guide to whether you may need a personal consultation and further evaluation.
6 questions — 2 minutes — clear results
Answer 6 questions about your age, family history, and reproductive health. The calculator will estimate your individual risk and compare it with the average for women your age.
The result will show your 5-year and lifetime risk of developing breast cancer, with a personalised recommendation on what steps to consider next.
The calculator is designed for women aged 35 to 85 who have not previously been diagnosed with breast cancer. It is based on the Gail Model — a validated tool from the National Cancer Institute (NCI) used in clinical practice since 1989.
Risk Assessment Results
Based on your answers, calculated using the Gail Model (NCI)
Comparison with Population Risk
- Regular mammography according to age guidelines
- Annual breast exam with your doctor
- Maintain a healthy lifestyle (weight, physical activity, limiting alcohol)
- Discuss an individual screening schedule with an oncologist
- Genetic counselling (BRCA1/2 testing)
- Mammography + breast ultrasound
- Enhanced screening (mammography + MRI)
- Genetic testing
- Discuss chemoprevention options with an oncologist
- Individualised surveillance strategy
Medical Disclaimer. This is a risk factor assessment, not a way to diagnose or rule out cancer. The calculator does not account for genetic mutations (BRCA1/2), breast density, prior chest radiation, and several other factors. A complete risk assessment requires an oncologist consultation.
The data you enter is not stored or transmitted to any third party — all calculations are performed entirely in your browser.
Discuss Your Results with an Oncologist
The calculator is only the first step. A comprehensive risk assessment and screening strategy require a specialist consultation
Frequently Asked Questions About the Risk Calculator
The Gail Model is a statistical tool developed by the National Cancer Institute (NCI) to estimate an individual woman's risk of developing invasive breast cancer. It has been used in clinical practice since 1989 and considers age, reproductive history, family history, and biopsy results.
The model has been validated in large epidemiological studies and is widely used for decisions regarding chemoprevention and enhanced screening.
The Gail Model provides good calibration at the population level, but its accuracy for any individual is limited. The calculator does not account for genetic mutations (BRCA1/2), mammographic breast density, or other important factors.
The result is a statistical estimate, not a diagnosis. It helps determine whether it is worth discussing enhanced monitoring or prevention with your doctor.
The calculator is intended for women aged 35 to 85 who have not been previously diagnosed with invasive breast cancer, ductal carcinoma in situ (DCIS), or lobular carcinoma in situ (LCIS).
It is not suitable for BRCA1/2 mutation carriers — other risk assessment models are used in such cases (e.g., BRCAPRO or the Tyrer-Cuzick model).
A high calculated risk is a reason to consult with an oncologist, but not a reason to panic. The doctor will evaluate all factors together, order additional tests if needed, and suggest an individualized monitoring or prevention strategy.
Depending on the situation, recommendations may include: enhanced screening (mammography + MRI), genetic counseling, chemoprevention (tamoxifen, raloxifene, aromatase inhibitors).
Some risk factors (age, genetics, family history) cannot be changed. However, a healthy lifestyle, maintaining a normal weight, regular physical activity, and limiting alcohol can reduce overall risk.
For those with a high calculated risk (≥1.67% over 5 years), a doctor may recommend chemoprevention. The decision is always made on an individual basis, weighing the benefits against potential side effects.