Enter the true negative rate and the false negative rate into the calculator to determine the negative predicted value.

## Negative Predictive Value Formula

The following formula is used to calculate a negative predictive value.

NPV = TNR / (TNR + FNR)

- Where NPV is the negative predictive value
- TNR is the true negative rate
- FNR is the false negative rate

## Negative Predictive Value Definition

A negative predictive value is defined as the probability that a negative result will be a false negative.

## Negative Predictive Value Example

How to calculate negative predictive value?

**First determine the true negative rate.**Calculate the rate at which a true negative test results is found.

**Next, determine the false negative rate.**Calculate the rate at which a negative test results in a false negative.

**Finally, calculate the negative predictive value.**Using the formula, calculate the NPV.

## FAQ

**What is a negative predictive value?**

A negative predictive value is the probability or chance that people who get a negative test result, actually do not have whatever was being tested for. In other words, it’s a measure of how accurate a given test is.

**What is a positive predictive value?**

A positive predictive value is the probability that you actually have a disease given a positive test results.