Want to know how many calories in a Big Mac? McDonald's calorie calculator lets you check the amount of calories in any product on the McDonald's menu. This calorie calculator lets you pick each product one at a time and will add up the total calories for you. This is based on the McDonald's menu for the UNITED KINGDOM, your countries calories may vary. If you believe there is a McDonald's food that is missing from this calorie counter just press the 'send feedback' button and we will add it as soon as.