If you are 5 ft 1 and you weigh 191 lbs how many fat grams should you consume on a 1600 calorie diet?

This is an almost religious point. Most commonly it is believed that you should get 40% of your calories from carbs, 30% of the calories from proteins and 30% of the calories from fat. The low carb approach however advices to go almost as low as 10% of the daily calorie intake from carbs and then the intakes of protein and fat go up to still meet the desired amount of calories. You could try out which balance of these three works best for you. 1 gram of fat contains about 9 kilocalories. So if you choose the intake of 30% fat, then you take 30% of your daily kcalories and divide them by 9. So: (1600*0.3)/9 = 53.333333333 grams