# Negative Predictive Value Calculator

This online page holds the simple Calculator to calculate Negative Predictive Value (NPV) based on the positive and negative calls for the diseases that may affect a person. NPV is the probability of a person subjecting with a negative screening test who truly do not have the disease. NPV in this Negative Predictive Value Calculator can be determined by the number of true negatives divided by the number of negative calls.

Code to add this calci to your website

#### Formula:

Negative Predictive Value = True Negative / (False Negative + True Negative) x 100

#### Example

**The true positive and true negative values are 2,3 and the false positive and false negative values are 6,9. **
Negative Predictive Value = (3 / (9 + 3)) x 100

= 25 %

Negative predictive value calculator predicts the value for both true negatives and false negatives. True negative is the event in which the test makes a negative prediction and false negative is the event in which the test makes a positive prediction.