That 40g probably includes a bun, ketchup, mustard, etc...I initially put it in as 4 oz. Ground beef (weight before cooking). But, I later took the numbers for 4 oz. of ground beef and a slice of cheese...and created a custom food "1/4 Pound Cheeseburger." A quarter pounder/classic single w. cheese is punched in as 1 serving...A double quarter pounder/classic double w. cheese as 2 servings, and a classic triple w. cheese as 3 servings.