Pantry & Condiments
Convert cups of mayonnaise to ounces
One cup of mayonnaise weighs about 7.76 oz, and half a cup comes to roughly 3.88 oz. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 cup of mayonnaise =
7.76 oz
- kg
- 0.22
- lb
- 0.485
Mayonnaise: 220 g per US cup · USDA FoodData Central. Emulsified oil holds air, so mayo is lighter per cup than most sauces.
Full mayonnaise chart →Mayonnaise at a glance
Every number on this page comes from a single figure: 220 grams per US cup (USDA FoodData Central).
- 1 cup
- 220 g
- 1 tablespoon
- 13.8 g
- 1 teaspoon
- 4.58 g
- 1 cup in ounces
- 7.76 oz
- 100 g in cups
- 0.455 cups
- Density
- 0.93 g/ml
cups to ounces chart for mayonnaise
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 | 27.5 g | 0.97 oz | 0.061 lb |
| 1/4 cup | 55 g | 1.94 oz | 0.121 lb |
| 1/3 cup | 73.3 g | 2.59 oz | 0.162 lb |
| 1/2 cup | 110 g | 3.88 oz | 0.243 lb |
| 2/3 cup | 147 g | 5.17 oz | 0.323 lb |
| 3/4 cup | 165 g | 5.82 oz | 0.364 lb |
| 1 cup | 220 g | 7.76 oz | 0.485 lb |
| 1 1/2 cup | 330 g | 11.6 oz | 0.728 lb |
| 2 cup | 440 g | 15.5 oz | 0.97 lb |
| 3 cup | 660 g | 23.3 oz | 1.46 lb |
| 4 cup | 880 g | 31 oz | 1.94 lb |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat mayonnaise as 220 g per US customary cup, which works out to 0.930 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 mayonnaise accurately
Emulsified oil holds air, so mayo is lighter per cup than most sauces.
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 mayonnaise?
1 cup of mayonnaise is 7.76 oz. This is based on a density of 220 g per US cup.
How many ounces are in 2 cups of mayonnaise?
2 cups of mayonnaise is 15.5 oz, and 3.88 oz for half a cup.
How much is 100 g of mayonnaise in cups?
100 g of mayonnaise 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 mayonnaise?
Emulsified oil holds air, so mayo is lighter per cup than most sauces.
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.