How many calories, on average, do you need to burn to lose one pound (1 lb) of weight?

1. 2,500 calories.
2. 2,600 calories.
3. 3,500 calories.
4. 3,600 calories.

Correct answer: 3.

So, if you want to lose 20 lbs (9 kg) of weight, you would need to have a calories deficit* of 70,000 calories.

* Burn 70,00 more calories than the number of calories you eat.