How long would you survive in a vacuum?
We don't know exactly how long it would take a person to die in a vacuum since no one has ever done it, but we can make a pretty good guess based on the information and medical knowledge we do have. Our best estimate is...
You will probably survive for about 1½ minutes.
This is more or less how you’d spend that time...
1 second: Begin freezing (if in shadow) or burning (if in sunlight).
2 seconds: Begin swelling (you don’t explode though).
4 seconds: Moisture on skin, eyes and tongue boils due to zero air pressure.
8 seconds: Internal organs begin rupturing.
15 seconds: Lose consciousness, eardrums burst.
30 seconds: Blood begins to boil.
45 seconds: Heart can no longer pump blood.
60-90 seconds: You die.