Do you compute your Calorie?

I'm trying to lose certain weight. It has raised 14lbs over the past several months. I'm beginning to see belly bulges, larger thighs and butt. I tried to do some jogging to lose weight, but I notice I ate additional too then.
However, my friend told me to sign up at a website. He told me to track what I eat. Based on your weight and your targeted weight, the system will compute the preferred calories needed for a day.
There were days when I was overwhelming too much calories, while other days I had less. The good thing is that you can also track your nutrients and analyze them in a graph. You can also track your events and it will gauge how much you burn.
So do you track the quantity of calories you take?

Well I'm planning to trim down too. But nope I don't track my calories. I think that is to tedious to do. It's not every time you have a list of all calories of all food. I think it would be wiser to eat more proteins and veggies or fruits.. and limit carbs.. as carbs tend to have more calories.