What pressures can a human survive in?

[zeromodz]

I know that Earth has a surface pressure of 101.325 kilopascals. So right now we are all under this pressure, but what types of pressures will we start to die at? high and low pressures in pascals please. Thanks.

 

[mgb_phys]

Record for diving is about 500m, or 50 atmospheres = 5MPa
The limit isn't the pressure as such, the pressure inside is the same as outside - it's the chemical effects of gases at very high pressures, oxygen for example is toxic above about 3atm.

Oxygen is about 21% of air, and you can live with about 16% oxygen, so you would be able to survive a pure oxygen environment at 0.16atm or around 16KPa.