VPN
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Negative Predictive Value (NPV) Calculator is a valuable tool for statisticians and health professionals who need to evaluate the probability of a negative event occurring.
This calculator uses the classic formula TN/(TN+FN), where TN represents the number of true negatives and FN represents the number of false negatives.
NPV is particularly useful in medical diagnostic studies, where it's essential to determine the probability of a patient not having a specific disease.
In addition, NPV can be applied in other fields, such as marketing and finance, where the evaluation of negative probabilities is crucial for informed decision-making.
Frequently asked questions
What is the Negative Predictive Value (NPV)?
NPV is the probability of a result being negative, given that the result was classified as negative in a test or examination.
When should I use the NPV Calculator?
Use the NPV calculator when you need to evaluate the probability of a patient not having a specific disease or when you need to determine the probability of a result being negative in a test or examination.
What does TN and FN mean in the NPV formula?
TN represents the number of true negatives and FN represents the number of false negatives. The formula TN/(TN+FN) is used to calculate the probability of a result being negative.
Can I use the NPV Calculator in other areas?
Yes, the NPV calculator can be applied in other areas, such as marketing and finance, where the evaluation of negative probabilities is crucial for informed decision-making.