How much weight does pasta gain when boiled?
The accepted answer to the question about a closely related matter: "how much water does pasta absorb", to obtain its result goes through a calculation involving direct answer to my question. 


  100g dry pasta turns into 100g*75/31 = 242g of cooked pasta.


and


  The estimate below from the nutrition facts is 1.4x, which probably corresponds to typical American overcooked pasta - a surprisingly large difference from mine. I'm guessing you'll be somewhere between, maybe 1.25x.


Obviously getting the amount of pasta+water involves simply increasing these factors by 1, so al dente will weigh 2.25x the original, and 'typical American overcooked pasta' will be 2.4x the original weight.

For my allowance of 75g that gives me 180g of "overcooked" pasta or 170g of al dente.