How much Sculptra would I need to even out my butt?

Your question is similar to the one if I asked you how much water do I need to fill my cup. You can’t possibly know the size of the cup I’m talking about and I don’t know how big your buttocks are or the defect you’re referring to . You need to be evaluated in person to determine if fat grafting perhaps might be helpful in your case or Sculptra. Only after an individual and in person consultation can A plastic surgeon determine approximately how much Sculptra needs to be used. I hope this helps and good luck from New York City plastic surgery