Quote:
Originally Posted by LLV
Weights vary, however, depending on the 'density' of the item. For example, 5 ounces of lettuce is going to be completely different than 5 ounces of meat. Or 4 ounces of liquid may not always equal 1/2 cup (which is technically 4 oz.) of other foods. Some serving sizes will indicate that 1/2 cup is 4 ounces but that's not necessarily true with all foods.
Sounds confusing, I know, but it's just something you gotta kind of work out on your own using measuring cups, food scales, etc.
I think this is why the weight portion is accurate as opposed to the size portion. 5 oz. of lettuce is going to be a much bigger portion than 5 oz. of meat - but they both still weigh 5 oz. However, half a cup of lettuce and half a cup of meat aren't necessarily equivalent. This is why most food packages list the weight of a portion but then give the size portion as an approximation. So, the weight portion they give is the most accurate for calorie counts, the size portion is the closest
estimate of common measurements to equate that weight (1/2 cup, cup, etc.) - but isn't necessarily and exact portion.