Is there a way to calculate how much A.E a province will give you before you declare the war?

I'm currently playing as Milan, with a perfect opportinuty to seize Modena, the last province I need for Italy, from Ferrara. They are allied to my ally, France, and France currently won't accept a call-to-arms. However, I'm sitting at about 45-55 AE with all of Italy and about 30 with the HRE. Can I calculate how much AE Modena would cause for me before declaring?