Calculating Specificity

How to Subscribe
MLS & MLT Comprehensive CE Package
Includes 173 CE courses, most popular
$95Add to cart
Pick Your Courses
Up to 8 CE hours
$50Add to cart
Individual course$20Add to cart
Need multiple seats for your university or lab? Get a quote
The page below is a sample from the LabCE course Quality Control. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Quality Control (online CE course)
Calculating Specificity

A test's specificity measures the percentage of individuals without the condition being tested for, who will have a negative test.

To calculate specificity, use the following formula:

True Negatives (TN)
Divided by True Negatives (TN) plus False Positives (FP)
Times 100
[TN ÷ (TN + FP)] x 100

The result is a percentage.