There's really no calorie counter available for home cooks- you would have to take your food to a lab and they would test it and do all of these calculations and stuff, so it would just be easier to add the calories your separate ingredients, and then divide into the amount of servings you would divide that dish into. Let me walk you through. This is not a real recipe(that I know of), just an example.
Chunky Sour Cream Soup
2 plum tomatoes, diced
1 large russet potato, peeled and diced
1 zucchini, diced
1 can of condensed cream of chicken soup
2 quarts of low sodium chicken broth
1 cup of water
3/4 cup sour cream
Salt and pepper to taste
The produce probably doesn't come with the nutrition facts on them so you would have to research these yourself. Information like this is usually really easy to find on the internet.
2 plum tomatoes, diced- 26 cal
1 large russet potato, peeled and diced- 100 cal
1 zucchini, diced- 45 cal
I found that info in bout 2 min. Not rocket science.
Okay, so now you have the cream of chicken soup that comes in a can. Conveniently, there is a nutrition label smacked on there for your convenience. Supposedly. Make sure you check to see how many servings are in the can, then multiply the cal/serving times the servings in the can.
1 can of condensed cream of chicken soup- 300 cal
You can probably do that in your head.
Chicken broth- depending on wear you get it, you will either need to google it or check the nutrition facts.
2 qts chicken broth- 80 cal
Water is ALWAYS zero calories!!! :D
sour cream, you could do the math but googling it is probably easier
3/4 cup of sour cream- 253
Salt and pepper are freebies
So now you know hom many calories are in everything you put in. Add them all up and divide by how many servings are in the meal(we'll say 6)
I KNOW THIS LOOKS COMPLICATED but that's just because I'm explaining it all to you. All you will really have to do is punch numbers into your calculator and divide. Not everything is going to be totally accurate. You will be doing a lot of estimating, but seriously, who wants to count how many calories they consume every day and pull out measuring cups so they get and perfect serving? As long as you have the general idea, that's all that really matters and you will get the hang of what foods are high in calories and which aren't just by identifying the ingredients. Good luck! Hope that helped:)