Counting macros is counting calories.  It's just simplified since 1 gram carbs/protein = 4 calories, 1 gram fat = 9 calories.  Since all protein has fat we'll go 80% lean.  .8x160=128. So 128x4=512 calories 32x9=288.  Total about 820 calories carbs.  If that's all you're eating total, then that's a big calorie deficit. As in very low calories in vs. calories out.  It's the basis of EVERY fucking diet, you nimrod.