What's probably more important than knowing how many carbs, is knowing what kind of carbs and what they're doing to you. Choose "good" carbs that don't spike your blood sugar. Anything white is generally a bad carb. Refined sugar, refined flour, etc. Choose 100% whole grain breads (the fiber slows the processing of the carbs), honey for sweetening (lower glycemic load than sugar). Eat your carbs with protein and fat. Again, this slows the digestion of the carbs. Whole fruit is much better than fruit juice. Whole berries/grapes are LOTS better than dried berries/raisons. The water in them helps fill you up so you eat less of them. Dried berries have concentrated sugars.
Hope this helps.