I found this on a nutrition website:
Carbs and Fat Loss
If you are on a fat loss diet, then there's definitely no need to eat more than 100 grams of carbs in any one day. I don't necessarily support Atkins, but there are valid points to that diet. When I am in the middle of a hardcore cutting phase, trying to get as lean as possible in a given time frame, I will only consume 20-30 grams of low glycemic index carbs for breakfast.
For lunch I will try to avoid most carbs, opting for whole grain bread or a salad if necessary. My pre-workout drink is typically 1/2 a serving of Biotest Surge, I sip on Gatorade during the workout, then finish off with 1 serving of Biotest Surge after the workout. On non-workout days, I skip all of that and choose a protein bar, cheese, or a meat snack instead.
Dinner is always low carb during a diet. Soup, meat and vegetables, and salad are all great choices for low carb dinners. Appropriate snacks are meats, cheeses, protein bars or shakes, veggies, and other super-low carb foods. Typically in the midst of a diet phase, I eat around 75 grams of carbs on a non-workout day, and maybe 120-140 grams of carbs on a workout day.
In conclusion, I recommend that if you are moderately active, you should derive maybe 30% of your daily calories from carbs. Sure, my opinion differs from specialist government agencies, but that's only because I have seen low carb diets work. I have also seen Americans grow obese and suffer from a long list of carbohydrate induced diseases.
A 200 lb man on a 2500 calorie diet would probably eat maybe 180 grams of carbs in a day, all from unprocessed whole food sources. A 140 lb woman on a 1500 calorie diet might only eat 100 grams of carbs in a day.
Someone on a strict diet might limit themselves to 50 grams of carbohydrates a day regardless of sex or weight. Just remember to avoid those nasty sugary processed carbs so that you can stay healthy, avoiding energy crashes and adult-onset type II diabetes.
Dunno if it helps at all?