HIV Transmission Risk Calculator

HIV Risk Estimator

Note: These figures are estimates per single act based on CDC data. Actual risk can vary significantly based on biological factors. This is not a diagnosis. If you believe you have been exposed, seek PEP (Post-Exposure Prophylaxis) within 72 hours.
Exposure TypeRisk per 10,000 ActsPercentage Risk
Receptive Anal Sex1381.38%
Insertive Anal Sex110.11%
Receptive Vaginal Sex80.08%
Insertive Vaginal Sex40.04%
Sharing Needles630.63%
Oral SexLow / Rare< 0.01%