Carbs in Mashed Potatoes
The favorite choice for the term "Mashed Potatoes" is 1 cup of Mashed Potato which has about 33 grams of carbohydrate. The total carbohyrate, sugar, fiber and estimated net carbs (non-fiber carbs) for a variety of types and serving sizes of Mashed Potatoes is shown below.
Popular Types of Mashed Potatoes

Regular Mashed Potatoes
Net Carbs(g) Sugar(g) Fiber(g) Total Carbs(g)
1 small Potato 15.89 1.52 1.4 17.29
1 medium Potato 21.21 2.03 1.9 23.11
1 large Potato 31.68 3.04 2.9 34.58
1 long type Potato 35.00 3.35 3.2 38.20
1 cup 30.31 2.90 2.7 33.01
1 oz 4.06 0.39 0.4 4.46
Mashed Potatoes with Margarine and Milk
Net Carbs(g) Sugar(g) Fiber(g) Total Carbs(g)
1 small Potato 13.44 2.46 1.1 14.54
1 medium Potato 17.93 3.29 1.5 19.43
1 large Potato 26.88 4.93 2.2 29.08
1 long type Potato 29.72 5.44 2.4 32.12
1 cup 25.66 4.70 2.1 27.76
1 oz 3.45 0.64 0.3 3.75

Other Types of Mashed Potatoes

Net Carbs(g) Sugar(g) Fiber(g) Total Carbs(g)
Mashed Potatoes from Dry Mix 23.76 3.93 1.9 25.66
Mashed Potatoes with Whole Milk 33.61 3.17 3.2 36.81
Mashed Potatoes with Whole Milk and Butter 32.02 3.00 3.2 35.22
Mashed Potatoes with Whole Milk and Margarine 32.31 3.02 3.2 35.51
Mashed Potatoes made with Milk, Fat and Cheese 32.46 3.61 2.9 35.36
Mashed Potatoes made with Milk, Sour Cream and/or Cream Cheese 30.83 1.74 2.9 33.73


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More Nutrition Info for Mashed Potatoes