Calorie in one slice of lasagna pasta?

The calorie content of one slice of lasagna pasta can vary based on the ingredients and portion size, but on average, a standard slice of lasagna (about 1/9th of a 9x13 inch dish) contains approximately 300 to 400 calories. This estimate includes layers of pasta, cheese, meat, and sauce. For more precise information, it's best to check the specific recipe or product label used.