I believe the question is flawed from the get go, and completely approaches a spiritual truth from a fleshly perspective. When you start asking "how much" you've already missed the boat. "How much", is a question of measure and that's not what being reborn is, at all. See a lost soul can go and do measurable good deeds, and still hate God openly. While a less capable believer may not even have the means to do many works at all, yet spends every waking breath longing to do so and taking every opportunity to do so. God can not be put into a vial, or mathematical formula. God transcends these things, and that is why He tells us that the cross is foolishness to those who are perishing, because these things are only learned by direct revelation (as in a message, or "good news" if you will) because they can not be learned in the flesh (or by "law"). This is why I have such a problem (as in clash of ideas, not like a problem with them personally) with people when I say that works are the evidence of ones salvation, and their first comeback is this, "well how many works keep you saved?, and what about non-Christians that do good things, are they saved?". These things are coming so far away from what I'm trying to say that it's hard sometimes to understand where my communication is breaking down.
When I say that "as a result of" salvation. This means AFTER God gifted me with salvation that I not only didn't deserve, but actually deserved the "exact opposite of", this means that by Gods grace and no work at all. Was dead in my sin and completely incapable of doing ANYTHING at all pleasing to God, and He saved me. Okay salvation, praise Jesus mighty name, I'm forgiven and set free. Okay we all agree with this, ya-hoo, now this is what I'm talking about. Now because I was saved I am empowered to glorify the God that gave us everything, and to actually have the ability to please our Father. Now as a result of the free gift of salvation I will be changed, to what degree, how, and in what way is a personal thing and you're now on a walk with our Creator through His Son Jesus Christ. And my life is a testament of His power, and I will boldly proclaim this power. If you are in Christ you WILL produce fruit, it's impossible not to, and I actually hear Christians on this site make the literal case "you can be a Christian and do nothing for God", and I mean this, it it their argument and it blows my mind why in the world they want to paint our King in such a weak, powerless, pointless, and most of all hypothetical way.
I try to qualify this every time I talk about it that on paper what they say is not wrong, technically. I just feel lead to speak of the power of Jesus Christ to take us wicked fallen people and transform us into new creatures that can actually glorify our King. This is not a matter of worldly measurement, but your very nature transformed by the birth of your spirit and it's reconciliation to your Creator. These truths can not be spoken of in a "how much does it take" kind of way. In my opinion.