Boiling Water Displacement Level?

Hello all.

I hope someone is kind enough to answer this question for me.

How do you measure the displacement of boiling water?

An example:

I have a container that is 5 inches high, 11 inches in circumference, and 3.5 inches in diameter. At what height of liquid H20 in the container may I safely bring the water to a boil and avoid the spilling of the liquid from the top of the container?

Additionally, if anyone knows a formula to repeat this calculation with containers of various sizes that would also be greatly appreciated.

Regards,

Daniel