If you are looking at the composition of your diet with fat and protein, then once you subtract the carbs, you want a %age of the calories to come from fat, and a %age from protein. It's usually written as 70% and 25%, with the 80 cals from 20 grams of carbs being the other 5%.

So. A gram of fat has 9 calories. A gram of protein has 4. 25% of 1600 cals (at the 20 grams of carbs level) is 400 calories, or 100 grams of protein.

What is left is 1120 calories/9 calories/gram of fat=about 125 grams of fat. Clearly, that allows you a whole lot more than 1/2 tbsp of butter for your eggs!

I don't do the macros, myself. I am pretty generous with fat, and moderate with protein, and count carbs to be very very stingy with them.

I'm not hungry, cravings are rarely an issue, and I'm losing.