How can I calculate my tax savings from filing my Obamacare Insurance premiums as a deduction?

Let me give a bit of background.  Considering the increase in insurance premiums, yet again, I'm looking for alternatives to insurance.  I'm creating all necessary calculations that I need to make a reasonable comparison, but the last important number I need to factor in is how much I save on my taxes by filing my Health Insurance premiums as an appropriate deduction.

I'm not asking any of you guys to tell me how much I saved last year, but is there as reasonable, ballpark figure or easy formula I can use to calculate how much I saved in taxes by filing my insurance premiums as deductible expenses?