Sensitivity & Specificity Calculator
Result
Sensitivity & Specificity Calculator — free online calculator.
Formula
- Sensitivity & Specificity Calculator calculates its result from True Positives (TP), False Negatives (FN), True Negatives (TN), False Positives (FP). It uses the formula Sensitivity = TP/(TP+FN) · Specificity = TN/(TN+FP) · PPV = TP/(TP+FP) · NPV = TN/(TN+FN). Change any input to recalculate the result instantly.
- The main inputs are True Positives, False Negatives, True Negatives, False Positives. Enter them in the units and format shown in the calculator.
- Keep comparable quantities in compatible units whenever the formula combines or compares them.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Sensitivity & Specificity
- True Positives: 90 TP
- False Negatives: 10 FN
- True Negatives: 85 TN
- False Positives: 15 FP
Using True Positives (TP) = 90, False Negatives (FN) = 10, True Negatives (TN) = 85, False Positives (FP) = 15, the calculated result is 0.8947368421.
Sample result: Calculating…
Frequently asked questions
What does the Sensitivity & Specificity calculate?
Sensitivity & Specificity Calculator — free online calculator.
Which values should I enter?
Enter True Positives, False Negatives, True Negatives, False Positives using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Sensitivity = TP/(TP+FN) · Specificity = TN/(TN+FP) · PPV = TP/(TP+FP) · NPV = TN/(TN+FN).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.