Dairy & Cheese
Convert cups of egg whites to ounces
One cup of egg whites weighs about 8.57 oz, and half a cup comes to roughly 4.29 oz. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 cup of egg whites =
8.57 oz
- kg
- 0.243
- lb
- 0.536
Egg Whites: 243 g per US cup · USDA FoodData Central. One large egg white is about 33 g. Weighing whites is the only reliable way to scale meringues.
Full egg whites chart →Egg Whites at a glance
Every number on this page comes from a single figure: 243 grams per US cup (USDA FoodData Central).
- 1 cup
- 243 g
- 1 tablespoon
- 15.2 g
- 1 teaspoon
- 5.06 g
- 1 cup in ounces
- 8.57 oz
- 100 g in cups
- 0.412 cups
- Density
- 1.03 g/ml
cups to ounces chart for egg whites
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 | 30.4 g | 1.07 oz | 0.067 lb |
| 1/4 cup | 60.8 g | 2.14 oz | 0.134 lb |
| 1/3 cup | 81 g | 2.86 oz | 0.179 lb |
| 1/2 cup | 122 g | 4.29 oz | 0.268 lb |
| 2/3 cup | 162 g | 5.71 oz | 0.357 lb |
| 3/4 cup | 182 g | 6.43 oz | 0.402 lb |
| 1 cup | 243 g | 8.57 oz | 0.536 lb |
| 1 1/2 cup | 365 g | 12.9 oz | 0.804 lb |
| 2 cup | 486 g | 17.1 oz | 1.07 lb |
| 3 cup | 729 g | 25.7 oz | 1.61 lb |
| 4 cup | 972 g | 34.3 oz | 2.14 lb |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat egg whites as 243 g per US customary cup, which works out to 1.027 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 3/8 cups.
Measuring egg whites accurately
One large egg white is about 33 g. Weighing whites is the only reliable way to scale meringues.
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 ounces are in 1 cup of egg whites?
1 cup of egg whites is 8.57 oz. This is based on a density of 243 g per US cup.
How many ounces are in 2 cups of egg whites?
2 cups of egg whites is 17.1 oz, and 4.29 oz for half a cup.
How much is 100 g of egg whites in cups?
100 g of egg whites is about 3/8 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 egg whites?
One large egg white is about 33 g. Weighing whites is the only reliable way to scale meringues.
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.