Fruit & Vegetables
Convert cups of mashed potato to grams
One cup of mashed potato weighs about 210 g, and half a cup comes to roughly 105 g. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 cup of mashed potato =
210 g
- oz
- 7.41
- kg
- 0.21
- lb
- 0.463
Mashed Potato: 210 g per US cup · USDA FoodData Central. Plain mashed potato with no added butter or milk. Both additions raise the weight per cup.
Full mashed potato chart →Mashed Potato at a glance
Every number on this page comes from a single figure: 210 grams per US cup (USDA FoodData Central).
- 1 cup
- 210 g
- 1 tablespoon
- 13.1 g
- 1 teaspoon
- 4.38 g
- 1 cup in ounces
- 7.41 oz
- 100 g in cups
- 0.476 cups
- Density
- 0.89 g/ml
cups to grams chart for mashed potato
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Cups (US) | Grams | Ounces (weight) | Pounds |
|---|---|---|---|
| 1/8 cup | 26.3 g | 0.926 oz | 0.058 lb |
| 1/4 cup | 52.5 g | 1.85 oz | 0.116 lb |
| 1/3 cup | 70 g | 2.47 oz | 0.154 lb |
| 1/2 cup | 105 g | 3.7 oz | 0.231 lb |
| 2/3 cup | 140 g | 4.94 oz | 0.309 lb |
| 3/4 cup | 158 g | 5.56 oz | 0.347 lb |
| 1 cup | 210 g | 7.41 oz | 0.463 lb |
| 1 1/2 cup | 315 g | 11.1 oz | 0.694 lb |
| 2 cup | 420 g | 14.8 oz | 0.926 lb |
| 3 cup | 630 g | 22.2 oz | 1.39 lb |
| 4 cup | 840 g | 29.6 oz | 1.85 lb |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat mashed potato as 210 g per US customary cup, which works out to 0.888 g/ml. From there:
- Your cups figure is converted into millilitres or grams using standard unit sizes (cup = 237 ml).
- The density above bridges volume and weight in whichever direction you need.
- The result is rounded the way a cook would round it — to the nearest gram, or to a usable fraction such as 1/2 cups.
Measuring mashed potato accurately
Plain mashed potato with no added butter or milk. Both additions raise the weight per cup.
If a recipe matters to you — bread, macarons, anything with a tight hydration or ratio — weigh it. A £10 digital scale removes the single largest source of variation in home baking, and it is faster than washing three measuring cups.
When cups are fine
- Liquids measured in a proper jug, where volume is the honest unit anyway.
- Forgiving savoury cooking: soups, stews, stir-fries, marinades.
- Small amounts of leaveners and spices, as long as you use level spoons.
Frequently asked questions
How many grams are in 1 cup of mashed potato?
1 cup of mashed potato is 210 g. This is based on a density of 210 g per US cup.
How many grams are in 2 cups of mashed potato?
2 cups of mashed potato is 420 g, and 105 g for half a cup.
How much is 100 g of mashed potato in cups?
100 g of mashed potato is about 1/2 cups. Weight is always the more reliable measurement, so use a scale when the recipe gives grams.
Why do other sites give a different number for mashed potato?
Plain mashed potato with no added butter or milk. Both additions raise the weight per cup.
Do UK and Australian cups give the same result?
No. A US customary cup is 236.6 ml, a metric cup used in Australia and New Zealand is 250 ml, and an old UK imperial cup is 284 ml. Our default is the US cup, but you can pick metric cups in the converter.