100 grams protein = ? calories

[Guest guest]

Hi! Went to Gold's Gym today and talked to a personal trainer.

I was telling him about this diet, he inquired how many calories it

was. I told him a 500 calorie diet. He said how can it be a 500

calorie diet if you are eating 100 grams of protein 2 times in a day.

He said 100 grams protein = 400 calories. I have no idea whether or

not this is true, but I am looking for any insight anyone may have on

this.

Dawn