HIV Risk Calculator: Per-Act Transmission Odds

Estimated Risk:
1 in ———
Select an act to see data.

Disclaimer: This tool provides statistical averages based on CDC and medical data for informational purposes only. Actual risk varies significantly based on viral load, STIs, and other biological factors. If you believe you were exposed, seek PEP (Post-Exposure Prophylaxis) from a doctor within 72 hours.

ActivityStatistical Risk (Per 10,000 Acts)“1 in X” Chance
Receptive Anal Sex1381 in 72
Insertive Anal Sex111 in 909
Receptive Vaginal Sex81 in 1,250
Insertive Vaginal Sex41 in 2,500
Oral Sex~11 in 10,000+

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