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STI Test Window Calculator

Enter the date of a potential exposure to see general testing-window dates for common STIs. The dates explain what a test may detect; they do not tell you whether you acquired an infection.

The date stays in this browser tab. It is not added to the URL or sent to analytics.

What these dates mean

Detection windows vary with the infection, test technology, sample site and clinical circumstances. A negative result taken within a window may need follow-up. Symptoms, a partner diagnosis or possible HIV exposure within 72 hours call for clinical assessment instead of waiting for a calculated date.

For the full comparison, source notes and test-site guidance, read the complete STI testing window-period guide.

Need help choosing a test?

View Ovio's STI testing service or ask the team what options are available for your timing and location. Ovio does not claim to provide HIV PEP.