Bottom Paint, How Much to Buy?

[mainiac]

Can anyone give me an estimate of the amout of bottom paint I'll need for a 31ft Sea Ray 310?
I'll be using a good quality ablative paint $130/gal and I'd like to buy enough but not have much left over.
Thanks

 

[Gregory S]

2gal should get you two coats. It will be close though.

 

[regulator]

1.5 gallons will cover the bottom twice