How likely is it to get HIV if you have unprotected vaginal sex with a HIV + male? (NSFW)

Close to 100% from a male positive carrier to a non-infected female. HIV is transmitted through the following body fluids:

Blood
Semen
Pre-cum
Rectal fluids
Vaginal fluids
Breast milk

Studies have demonstrated that male-to-female HIV transmission during vaginal intercourse is significantly more likely than female-to-male HIV transmission. In other words, HIV-positive men are much more likely to transmit the virus to HIV-negative women through vaginal intercourse than HIV-positive women are to HIV-negative men.

Vaginal sex is just as risky as being the male ‘catcher’. Both areas are lined with mucosal tissue where the virus easily enters.
Here… read this: https://www.poz.com/basics/hiv-basics/hiv-transmission-risks

I hope you’re not asking this because this is something you’ve done.

If you have had unprotected sex with someone with HIV, you need to get yourself to a clinic now and given an education on the subject and then tested and then tested again.

Assuming there are no open sores on the penis/vagina and no other active STD’s etc then the risk of male to female transmission is about 7–8 out of 10,000 exposures (ish depending on which research you look at).
Female to male transmission is about 4 in 10,000 so about half as likely.
Male to male transmission is about 1 in 100 exposures (ish again depending on the research you look at).

Likely enough not to risk it. And the time between exposure and discovery of the antibodies which is first sign is up to a year. During which time you can be passing it along.

Similar to playing Russian roulette.

There is a 99 percent chance you WILL get it. However I have seen documentaries of people that had unprotected sex with a HIV positive person and did not get it. But this is quite rare and similiar to a documentary of a woman I saw that was living with HIV for years but had no symptoms at all and doctors were using her for research to find a cure. So if you do not get it , it is because you have some rare biological makeup that most do not have.