Unless you are following a specific diet (like Atkins mentioned above), a good rule of thumb is keeping your net carbs between 125g and 150g and try and get most of those carbs from vegetables, low sugar fruits/berries and good sources of dairy (cottage cheese, ricotta cheese). I was consuming about 225-250 g of carbs from mainly cereals, breads, crackers, pastas and despite a ton of excercise, I couldn't lose any weight. For me, the key was changing what I was eating and I could tell because I feel so much better. Good luck!
this damn tracker below hasn't been right in months! My current weight is 139!