Writing some fiction, need to make some calculations

[Izack]

To resist the pressure, Izack, the pressure... atmospheric pressure does not crush you from above, it crushes you from... everywhere.

D'oh! :facepalm:

Gravity doesn't scale like that, AFAIK. For one the radius of the planet will not scale linearly with the mass increase because it does not correlate directly to volume increase, and such a planet will also accrete more silicates etc, and thus be less dense.

He was multiplying five Earth masses, not radii.