How many calories are in 1 gram of lipid?

9 kcals/gram

Fats and oils contain about 9 kcal/gram. Lipids are a broader category and the answer for lipids is more complex.

Lipids are insoluble in water and soluble in fat. There are many different types of lipids. There are 3 main categories of dietary lipids; fats and oils, phospholipids, and cholesterol. Fats and oils contain about 9 kcals/gram. Phospholipids, of what lecithin is a good example, contain about 7 kcals/gram. Cholesterol contains no calories at all. Is insoluble in water and soluble in fat, but is not energy producing - it does not contain any calories at all.