As Sun Salutation has 12 asanas to complete one cycle and two cycles to complete once set. One cycle burns approximately 13.90 calories, 27.8 calories burn in completing one set.
So, If someone is completing 108 cycles/ 54 sets, it requires 1500 calories. In this way, if you spend 3500 calories, one pound of weight will reduce. To lose 1 kg of weight, you must spend approx 7700 calories practicing Surya Namaskar.