Breast Cancer Calculators

This website provides a comprehensive suite of breast cancer calculators and risk assessment tools for healthcare professionals. The calculators are designed to assist with breast cancer prognostication, risk stratification, and treatment planning using validated models and up-to-date clinical evidence. Each tool is presented with transparent methodology and reference information, supporting informed clinical decision-making in both pathology and multidisciplinary settings.

We thank the clinicians, scientists, and investigators who have created these tools and made them available for anyone to use.

The calculators are grouped as the following:

Frequently Used Pathology Calculators: Core tools for pathologists, including Magee Equations, H-score, NPI, PEPI, and Residual Cancer Burden.

Risk Assessment Models: Tools for estimating the risk of developing breast cancer, including the Gail Model, Tyrer-Cuzick, and BCSC calculators.

Recurrence/Treatment Models: Models for assessing recurrence risk after invasive breast cancer diagnosis and for guiding therapy, such as Predict and CTS5.

Other Calculators: Additional resources for specialized scenarios, including MD Anderson and Mayo Clinic tools.

Frequently Used Pathology Calculators

Magee Equations, H-score, NPI, PEPI, Residual Cancer Burden

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Risk Assessment Calculators

Gail Model, Tyrer-Cuzick, BCSC

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Recurrence/Treatment Calculators

Predict Tool, CTS5

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Other Calculators

MD Anderson, Mayo Clinic, and more

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The calculators on this website are not for general public use. These calculators should only be used by medical professionals who understand their usefulness and limitations. Medical professionals should use these calculators at their own discretion and this information should not be used in isolation for the diagnosis or treatment of any health problem or disease. The information is not intended to replace clinical judgment or guide individual patient care in any manner and is not provided in the course of a professional relationship between a health care provider and a patient. The website creators are not liable for any direct, indirect, incidental, special, consequential or punitive damages arising in any way from the actions taken by medical professionals based on the information provided by the calculators or any other information set forth herein. The creators of this website hereby disclaim any warranty of any kind, express or implied, including but not limited to the implied warranties of title, noninfringement, merchantability and fitness for a particular use or purpose.