1 Kg of fat? 

1 Kg is 2.2 lbs and 1 lb is 3500 calories, so 1 Kg is 3500 X 2.2= 7700 calories 

or you can estimate how many calories you need to burn to maintain your body weight..

so this is my suggestion..

http://www.calculator.net/ 

finally, watch out!!

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