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NPV Calculator

Compute NPV = spec(1−prev) / ((1−sens)prev + spec(1−prev)).

Input Data

Input Sensitivity sens.
Input Specificity spec.
Input Prevalence prev.

Results

0.975904
NPV = spec(1−prev) / ((1−sens)prev + spec(1−prev)).

At a glance:NPV Calculator: enter parameters to compute results; complements related calculators.

Formula

NPV = spec(1−prev) / [(1−sens)prev + spec(1−prev)].

How to Use

  1. Enter sensitivity, specificity and prevalence.
  2. It returns NPV.

Case Studies

sens=0.8, spec=0.9, prev=0.1 → NPV≈0.976

NPV = 0.81/(0.02+0.81) ≈ 0.9759.

FAQ

NPV vs prevalence?

Lower prevalence raises NPV (negatives more trustworthy).

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:NPV Calculator（/statistics/negative-predictive-value）。