How many kilo calories make 1 ATP?

One molecule of ATP (adenosine triphosphate) releases approximately 7.3 kilocalories (kcal) of energy when it is hydrolyzed to ADP (adenosine diphosphate) and inorganic phosphate. This value can vary slightly depending on the cellular conditions and the specific reactions involved. However, the general estimate for the energy released per ATP molecule is around 7.3 kcal.