A bit confusing with creating own meals

Jar15a

I have been using MFP for a some time and still am a bit confusing how to use "create your own meal" correctly.
For example; tuna pasta meal: 105 g tuna(85kcal/100g), 75g pasta(348kcal/100g) I eat this meal, lets say 85g's.
So if I feed 0,85 to program as normally with one single food, this gaves me all values wrong because total values for the meal are 180g and 433 kcal in a database.
Meaning above gives me total meal 180kcal/200g.
Or if I use values that are for 100g each food, program thinks I'm eating the whole meal, 200g.

How do I put these so the total meal is kcal/100g? Doesn't the program calculate this for kcals/100g, or is it premium program feature?
This far I had to calculate total kcal's for each meal by excel. Pretty hard when we have program that should do it easily.
Hope you understand what I mean. Did not find messages regarding this so I think I do something totally wrong.

Can't be this "hard", is it.

janejellyroll

If you want to calculate calories per 100 grams of total recipe today, use the Recipe Builder. The "Meal" tool is designed for combinations of foods that you frequently eat and you'll need to adjust each component individually.

fdlewenstein

I've had very good luck with using the recipe builder using both my own recipes and online recipes. I also using the meal tool and my food. If I have any doubt I go in and change as needed. All of these are extremely helpful and worth the little time it takes to input the information.