I had surgery for my inguinal hernia on april 30th 2015 and was wondering when will i be able to exercise in terms of lifting weights and cardio?

Depend on how?: depend on how your hernia was repaired first with screen or without screen second it was done open or laproscopic surgery third was it a recurrent hernia or a first time hernia fourth what kind of inguinal hernia,direct,indirect,femoral. without knowing details i will say you need 2-3 month before you start any physical fitness. the final word is from your surgeons they will tell you when and how.