Should I or should I not have more tuna pasta salad. Do you know what the most amusing thing about it is? The entire bag of 16oz. of pasta is only a little over 1600 calories. Plus the mayo and the tuna and the whole kit and caboodle is around 2200 calories. Well, one could eat the whole thing over the course of the day and still not gain weight. If I have one more helping I'll probably have had half of what I made - so 1200 calories - not bad.