Custom Food - serving sizes

Hey guys,

I was thinking about this and it seems like it'd be a great way of having a lot of flexibility in the custom foods (especially for those of us psychotic enough to actually weigh our foods).

I, for one, don't always eat food based on the serving size recommended on the container (yogurt, for example).  Something that I think would be really helpful would be to have multiple types of "sizes" in the custom foods.  For example, it would be really great if I could put food in either per gram  or per cup or per serving. 

Let's say that I'm eating a piece of bread - the nutrition information is 100 calories/1 slice (50g).  When I input the food, it would be great to have the option of either putting in the calories per serving size (1 slice) like it is now AND/OR per 50 grams where the system then calculates the calories per gram.  That way, if my next slice of bread happens to weigh 75g, the system will automatically put 150 calories in.  Am I making sense?

I see the custom food input screen as being something like:

Name of food: ___________________

Amount (number of units): _________ (in this case 50 if inputting grams or 1 if inputting slices)

Units: _____________ (with a selection of units, such as "serving" which would be the 1 slice or grams, ounces, cups, ml,  teaspoons, tablespoons, etc)

The system could then do the math to calculate the values based on what you put in for amount*units.  So, for example, I just input my cereal.  I don't always eat 56 grams of cereal (the serving on the box), but when I input it the custom food, it'd be great to be able to input 56 grams, so that if I eat 67 grams next time, I can put that in and the nutrition calculator without having to do the math of how many 56g servings are found in 67g of cereal.

I might not have been clear.  It totally makes sense in my head but may not translate very well, haha.