. If there are 1,100 calories in 12 ounces of hot fudge how many calories are in 3 ounces of hot fudge.Solutions:=> 12 ounces of hot fudge = 1 100 calories=> 1 100 / 12 = 91.7 calories per 1 ounce of hot fudgeNow, let us find how much calories will it have in 3 ounces.=> 91.7 ounces of calories * 3 ounces = 275 calories.Therefore, there are 275 calories in 3 ounces of hot fudge.