figuring calories in sausage kalache recipe

I'm making kolaches from scratch, plan to enjoy them with rest of family but would like to have a fairly close idea of calories. Would this work? Weigh finished dough & sausage (will not know how many I will use so likely to have to edit total grams) using grams then make serving 100 grams. Am I right in thinking weighing the finished kolache (using 100 grams as portion) would then give me a correct calorie account. I don't want to be fanatical about it but would like to be fairly close.