Pantry & Condiments
Convert ounces of mayonnaise to cups
One ounce of mayonnaise weighs about 0.129 cup, and half a ounce comes to roughly 0.064 cup. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 oz of mayonnaise =
0.129 cup
About 1/8 cup in recipe notation
- ml
- 30.5
- tbsp
- 2.06
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
ounces to cups chart for mayonnaise
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Ounces (weight) | Cups (US) | Tablespoons (US) | Millilitres |
|---|---|---|---|
| 0.5 oz | 0.064 cup | 1.03 tbsp | 15.2 ml |
| 1 oz | 0.129 cup | 2.06 tbsp | 30.5 ml |
| 2 oz | 0.258 cup | 4.12 tbsp | 61 ml |
| 3 oz | 0.387 cup | 6.19 tbsp | 91.5 ml |
| 4 oz | 0.515 cup | 8.25 tbsp | 122 ml |
| 5 oz | 0.644 cup | 10.3 tbsp | 152 ml |
| 6 oz | 0.773 cup | 12.4 tbsp | 183 ml |
| 8 oz | 1.03 cup | 16.5 tbsp | 244 ml |
| 12 oz | 1.55 cup | 24.7 tbsp | 366 ml |
| 16 oz | 2.06 cup | 33 tbsp | 488 ml |
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 ounces figure is converted into millilitres or grams using standard unit sizes (oz = 28.3 g).
- 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 cups are in 1 ounce of mayonnaise?
1 ounce of mayonnaise is 0.129 cup. This is based on a density of 220 g per US cup.
How many cups are in 2 ounces of mayonnaise?
2 ounces of mayonnaise is 0.258 cup, and 0.064 cup for half a ounce.
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.