Sensitivity & Specificity Calculator
Calculate diagnostic test performance metrics
2x2 Contingency Table:
| Disease + (Actual) | Disease - (Actual) | |
|---|---|---|
| Test + | ||
| Test - |
About Sensitivity and Specificity
Sensitivity (True Positive Rate): Probability of a positive test given disease is present. = TP / (TP + FN)
Specificity (True Negative Rate): Probability of a negative test given disease is absent. = TN / (TN + FP)
PPV: Probability of disease given a positive test.
NPV: Probability of no disease given a negative test.
Likelihood Ratios: Indicate how much a test result changes the odds of having disease.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.