how many calories is one pound of fat equal to
One pound of fat is equal to about 3500 calories. That means that if you eat an extra 350 calories of food a day, which is about equal to a large piece of cake or a medium milkshake, you would gain an extra pound about every 10 days (350x10). Or you would gain a pound in about 20 days if you eat or drank an extra 175 calories a day (175x20).