Depending on your height and weight as well as the activity hours you entered into the calculator, this may be accurate. Perhaps you overestimated your activity?
Not all persons need a 1200 calorie diet. Research has found that quick weight loss diets of > 2 pounds per week are quickly regained.
The amount of fat grams would depend on the nutritional goal you selected for the percent calories from fat.
Try the calculator again and re-think your activities and fat percent goal. The calculator is designed with formulas used in current nutrition research and practice to ensure accuracy but is dependent on user entered data to compute.