This chip is 471 kcal per 100 g. Eyeballed portions of calorie-dense snacks miss by 50–200% (Almiron-Roig et al., Appetite 2013). A scale flips this from a guess into a number — one 28 g serving is ~131.9 kcal.
How should I track Potato chips, reduced fat?
Potato chips, reduced fat is high in potassium. When it comes to Potato chips, reduced fat, weighing beats counting every time. Snack pieces vary in size, and a handful from a bag can easily be 50–100% more than the label serving. Research (Almiron-Roig et al., Appetite 2013) shows that people consistently underestimate portions of calorie-dense snacks. Another common trap: multi-serving packages. The label might show 150 calories "per serving," but if the bag contains three servings, you are really looking at 450 calories. Always check whether values are per piece, per serving, or per package.