Help..... I'm looking for an app for my smart phone or website where you can enter ingredients or recipes, to calculate fat, calories, carbs, sugars based on number of servings.

My fitness pal has this functionality and it is very popular on bariatricpal :-D

I second My Fitness Pal - I've been using it for over two years. But other folks on the forum are very happy with SparkPeople as well. food logs are an incredibly powerful tool. With a little experimentation and fine-tuning you will be amazed at how it allows you to manage your weight with remarkable precision. There are many of us using it so don't hesitate to ask for tips.

You're gonna love the new you!!

I like myfitnesspal as well. It syncs with my fitbit and let's me know how well I'm doing.