Posttest Probability Calculator

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Posterior Probability Calculator

Enter Numbers and Click the "Compute Button":

Prior Probability (%)
Likelihood Ratio
Prior Probability:
Prior Odds:
LR:
Posterior Odds:
Posterior Probability:
Posterior Probability (%):

Posttest Probabilities for Common Pretest Probabilities Using Entered LR

Prior Prob Post Prob Prior Prob Post Prob Prior Prob Post Prob

1%
35%
70%
5%
40%
  
75%
  
10%
45%
  
80%
  
15%
50%
  
85%
  
20%
55%
  
90%
  
25%
60%
  
95%
  
30%
65%
  
99%