Breast Cancer Recurrence Risk Calculator
Result
Breast Cancer Prognosis (Nottingham Prognostic Index) Estimate breast cancer prognosis using the Nottingham Prognostic Index (NPI), a widely used score based on tumour size, lymph node involvement, and tumour grade. Enter the three factors to see the NPI — free online calculator.
Formula
- Breast Cancer Recurrence Risk Calculator calculates its result from Tumour Grade, Lymph Node Stage, Tumour Size In Cm. It uses the formula NPI = (0.2 × Tumour Size in cm) + Lymph Node Stage (1–3) + Tumour Grade (1–3). Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Tumour Grade, Lymph Node Stage, Tumour Size In Cm. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Breast Cancer Recurrence Risk
- Tumour Grade: 2
- Lymph Node Stage: 11
- Tumour Size In Cm: 12
Using Tumour Grade = 2, Lymph Node Stage = 11, Tumour Size In Cm = 12, the calculated result is 15.4.
Sample result: Calculating…
Frequently asked questions
What does the Breast Cancer Recurrence Risk calculate?
Breast Cancer Prognosis (Nottingham Prognostic Index) Estimate breast cancer prognosis using the Nottingham Prognostic Index (NPI), a widely used score based on tumour size, lymph node involvement, and tumour grade. Enter the three factors to see the NPI — free online calculator.
Which values should I enter?
Enter Tumour Grade, Lymph Node Stage, Tumour Size In Cm using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: NPI = (0.2 × Tumour Size in cm) + Lymph Node Stage (1–3) + Tumour Grade (1–3).
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.