Mashed Potatoes: Grams to Cups
1 cup of mashed potatoes = 210 grams
One US cup of mashed potatoes weighs 210 grams. One 250 ml metric cup — the one used in the UK, Australia, New Zealand and Canada — holds 222 grams. To convert any weight, divide the grams by the figure for your cup.
A cup of mashed potatoes weighs 210 g (USDA FoodData Central, potatoes mashed at home with whole milk and butter). USDA gives the same 210 g for mash made with margarine instead of butter, or from instant flakes or granules once they are mixed with milk. Store-bought refrigerated mashed potatoes are a little denser at 229 g a cup. Dry instant flakes are very light, 60 g a cup, while dry granules weigh 200 g.
Where the 210 g figure comes from
- USDA FoodData Central: 1 cup of “Potatoes, mashed, home-prepared, whole milk and butter added” = 210 g (FDC ID 168555)
This site uses 210 g per US cup of mashed potatoes, spooned and levelled. References checked September 2026.
How many cups is X grams of mashed potatoes?
| Grams | US cups | Metric cups | Tablespoons | Ounces |
|---|---|---|---|---|
| 25 g mashed potatoes | ⅛ | ⅛ | 1.9 | 0.88 |
| 50 g mashed potatoes | ¼ | ¼ | 3.81 | 1.76 |
| 75 g mashed potatoes | ⅜ | ⅓ | 5.71 | 2.65 |
| 100 g mashed potatoes | ½ | ½ | 7.62 | 3.53 |
| 110 g mashed potatoes | ½ | ½ | 8.38 | 3.88 |
| 120 g mashed potatoes | ⅝ | ½ | 9.14 | 4.23 |
| 125 g mashed potatoes | ⅝ | 0.56 | 9.52 | 4.41 |
| 130 g mashed potatoes | ⅝ | ⅝ | 9.9 | 4.59 |
| 140 g mashed potatoes | ⅔ | ⅝ | 10.67 | 4.94 |
| 150 g mashed potatoes | ¾ | ⅔ | 11.43 | 5.29 |
| 170 g mashed potatoes | ¾ | ¾ | 12.95 | 6.00 |
| 175 g mashed potatoes | ⅞ | ¾ | 13.33 | 6.17 |
| 200 g mashed potatoes | 0.95 | ⅞ | 15.24 | 7.05 |
| 225 g mashed potatoes | 1⅛ | 1 | 17.14 | 7.94 |
| 240 g mashed potatoes | 1⅛ | 1⅛ | 18.29 | 8.47 |
| 250 g mashed potatoes | 1¼ | 1⅛ | 19.05 | 8.82 |
| 275 g mashed potatoes | 1⅓ | 1¼ | 20.95 | 9.70 |
| 300 g mashed potatoes | 1⅜ | 1⅓ | 22.86 | 10.58 |
| 350 g mashed potatoes | 1⅔ | 1⅝ | 26.67 | 12.35 |
| 400 g mashed potatoes | 1⅞ | 1¾ | 30.48 | 14.11 |
| 450 g mashed potatoes | 2⅛ | 2 | 34.29 | 15.87 |
| 500 g mashed potatoes | 2⅜ | 2¼ | 38.1 | 17.64 |
How to measure mashed potatoes accurately
The 210 g figure assumes the spooned-and-levelled method: spoon the mashed potatoes into a dry measuring cup and sweep the top flat with a straight edge. Scooping the cup through the bag compacts it and gives a heavier cup.
- 1 US cup of mashed potatoes = 210 g
- 1 metric cup (250 ml) of mashed potatoes = 222 g
- ¾ cup = 158 g
- ½ cup = 105 g
- ⅓ cup = 70 g
- ¼ cup = 53 g
- 1 tablespoon = 13.1 g
Frequently asked questions
How many cups is 100 grams of mashed potatoes?
100 grams of mashed potatoes is about ½ US cups, based on 210 g per cup, or ½ metric cups.
How many grams in a cup of mashed potatoes?
One US cup of mashed potatoes weighs 210 grams. A 250 ml metric cup holds 222 grams.
How many cups is 250 grams of mashed potatoes?
250 grams of mashed potatoes is about 1¼ US cups, or 1⅛ metric cups.
Does a UK cup of mashed potatoes weigh the same as a US cup?
No. A UK, Australian or Canadian metric cup is 250 ml against the US 236.6 ml, so it holds about 5.7% more — 222 g of mashed potatoes rather than 210 g.
How many tablespoons is 100 grams of mashed potatoes?
100 grams of mashed potatoes is about 7.62 tablespoons.
How many grams is 1 cup of mashed potatoes?
210 grams for homemade mashed potatoes with milk and butter (USDA FoodData Central). Half a cup is 105 g.
How many cups is 1 kg of mashed potatoes?
About 4¾ cups. 1000 ÷ 210 = 4.76 cups of homemade mashed potatoes.
How many cups are in a tub of ready-made mashed potatoes?
About 3 cups. USDA weighs a container of ready-to-eat mashed potatoes at 700 g and a cup at 229 g, and 700 ÷ 229 = 3.06.
How much does a cup of instant potato flakes weigh?
60 grams dry (USDA FoodData Central). Dry potato granules are much denser at 200 g a cup, so do not swap one for the other by volume.