Well, it depends, are you cooking it at home or are you going out to eat?
I love to make pad thai at home. Here's Oprah's recipe:
http://www.oprah.com/foodhome/food/r..._padthai.jhtml
Nutritional information (using baked tofu and without eggs): 599 calories, 23 grams fat, 3 grams saturated fat, 1688 mg sodium, 64 grams carbohydrate, 33 grams protein
Nutritional information (healthier version without eggs): 463 calories, 12 grams fat, 2 grams saturated fat, 991 mg sodium, 58 grams carbohydrate, 31 grams protein