How this calculator works
Enter prior probability (%), test sensitivity (%), test specificity (%), independent positive tests. CalcStack applies the displayed formula and reports each intermediate planning value with the units shown.
Formula / method
Posterior = sensitivity × prior ÷ [sensitivity × prior + (1−specificity)(1−prior)]
Worked example
Use the documented default inputs to model bayesian probability update.
Assumptions and limitations
Inputs represent stable average operating conditions and the displayed equation applies.
This is a planning model; real systems and measurements can require domain-specific corrections.