How do you count calories when portion sizes are inconsistent?
So I understand the basic formula of "weigh all ingredients, add up the calories, and then divide by portion size". It worked really well when I cooked for myself, because even if my portion wasn't exactly 1/4, there'd be a different amount of leftovers the next day and it would all average out to the same.
But now I cook for me and my partner. He eats more than me, so when I'm finished cooking I let him grab his food first and then help myself to however much I want that night. The rest goes into a tupperware for my lunch the next day (he eats something else). The problem is; I'm not able to accurately measure what portion he's taking, and it's probably not even consistent throughout meals/days. How can I accurately measure calories under this system?