Post-Test Probability Calculator
Calculate revised disease probability after a diagnostic test using sensitivity, specificity, and likelihood ratios
About the Post-Test Probability Calculator
The Post-Test Probability Calculator is a free online tool from zCalculators that helps you calculate revised disease probability after a diagnostic test using sensitivity, specificity, and likelihood ratios It runs entirely in your browser, returns results instantly as you change inputs, and works on desktop and mobile without any signup or installation.
Frequently asked questions
What is the Post-Test Probability Calculator?
Calculate revised disease probability after a diagnostic test using sensitivity, specificity, and likelihood ratios
How do I use the Post-Test Probability Calculator?
Enter your values into the Post-Test Probability Calculator above. Results update instantly as you type — no signup or installation required. You can copy results, share the page, or embed the calculator on your own site.
Is the Post-Test Probability Calculator free to use?
Yes. The Post-Test Probability Calculator on zCalculators is completely free, requires no signup, and runs entirely in your browser. We don't store your inputs.
How accurate is the Post-Test Probability Calculator?
The Post-Test Probability Calculator uses standard, well-established formulas. Results are accurate for the inputs you provide, but should be treated as estimates and not a substitute for professional advice.