Brief Answer:
Almost less than about an hour.

Detailed Answer:
Hello dear,

Thanks for writing to us about your health care.

I can understand your concern here.

Sperm can survive for about an hour outside the human body means after ejaculation if semen is still wet, sperm can survive in it for an hour.

But sperm can survive in female genital tract for 3-5 days maximum upto 7 days.

Hope it is usefu, feel free to ask more questions.

Good day.

Regards

---