it depends what you put inside.
Avocados contain MUFAs (mono-unsaturated fatty acids). These are also known as "good fats". They help you body, and are different than the "bad fats" found in sugar and candy and chocolate and fried...
Avocado, raw
520 calories in a medium vanilla shake.
For an average avocado has 275 calories.
A single 136g avocado (approx. 4.8oz) has 227 calories.