To convert cups of mayonnaise into grams, multiply by 220: one cup comes to 220 grams. Every ingredient has its own figure here, because the units are measuring different things and only the density links them.
The density behind that figure is 0.92989 g per mL, against 1.00 for water. A cup of water weighs 236.6 g and a cup of mayonnaise weighs 220 g, so this ingredient is 92.99% as heavy as the same volume of water — the single fact the whole page rests on.
A cup of mayonnaise is 220 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 218.9 g and 222.2 g covers the range from lightly spooned to firmly packed. That 1% spread is larger than most of the adjustments recipes fuss over, and it disappears entirely the moment the ingredient is weighed instead.
Grams are the unit this conversion is really for. A domestic scale resolves to a gram, which is 0.455% of a cup of mayonnaise, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 2.273 cups, and a 1 kg pack 4.545.
The condition this weight assumes: An emulsion of oil in egg, so it is lighter per cup than the water-based sauces sitting next to it in the fridge.
The formula
cups- The amount of mayonnaise you are converting, in cups
220- Grams per cup for mayonnaise, from its density of 0.92989 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 220, the grams-per-cup figure for mayonnaise.
- The result appears in grams, with a second reading in oz beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
1/3 cup of mayonnaise in grams
A recipe calling for 1/3 cup of mayonnaise needs 73.3333 grams on the scale. The arithmetic is 0.333333 × 220 = 73.333333, and halving the recipe halves the weight to 36.6667 grams.
3/4 cup of mayonnaise in grams
3/4 cup of mayonnaise weighs out at 165 grams. Divide 165 by 220 and you get back to 3/4 cup, which is the quickest check that the factor is the right way up.
3 cup of mayonnaise in grams
3 cup of mayonnaise weighs out at 660 grams. Divide 660 by 220 and you get back to 3 cup, which is the quickest check that the factor is the right way up.
How to read your score
Frequently asked questions
How many grams are in 1 cup of mayonnaise?
One cup of mayonnaise is 220 grams. Half that quantity is 110 grams and double it is 440 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of mayonnaise not 236 g like water?
Because weight per cup depends on what is in the cup. Mayonnaise has a density of 0.92989 g per mL where water has 1.00, so a cup of it weighs 220 g rather than 236.6 g. That is a difference of 16.6 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Barely. Mayonnaise does not compress, so a cup of it is 220 g however it is poured — within about 1%, which is inside the accuracy of a domestic scale. This is the group where measuring by volume is defensible.
Is a fluid ounce of mayonnaise the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of mayonnaise weighs 0.97 oz, so the two readings differ by 3%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of mayonnaise would weigh 232.47 g instead of 220 g — 12.5 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
A scale, if the result matters. Volume measuring carries a spread of about 1% for mayonnaise — roughly 2.2 g on a 220 g cup — while a domestic scale is accurate to a gram or two. For anything where the ratio of ingredients drives the outcome, bread and pastry above all, weigh it.
How many cups of mayonnaise is 500 g?
500 g of mayonnaise is 2.2727 cups — 0.00454545 cups to one gram, so 500 × 0.00454545 = 2.2727. Going that way is a division by 220, or a multiplication by 0.00454545 if you prefer.
Mayonnaise in cups and grams
| Cups | Grams | Unrounded |
|---|---|---|
| 1/8 cup | 27.5 g | 27.5 |
| 1/4 cup | 55 g | 55 |
| 1/3 cup | 73.3333 g | 73.33333333 |
| 1/2 cup | 110 g | 110 |
| 2/3 cup | 146.667 g | 146.6666667 |
| 3/4 cup | 165 g | 165 |
| 1 cup | 220 g | 220 |
| 1 1/2 cup | 330 g | 330 |
| 2 cup | 440 g | 440 |
| 3 cup | 660 g | 660 |
| 4 cup | 880 g | 880 |
Based on 220 g per cup of mayonnaise. One cup of mayonnaise is 220 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 220 g | 7.76 oz | 236.6 mL |
| 3/4 cup | 165 g | 5.82 oz | 177.4 mL |
| 2/3 cup | 146.7 g | 5.17 oz | 157.7 mL |
| 1/2 cup | 110 g | 3.88 oz | 118.3 mL |
| 1/3 cup | 73.33 g | 2.59 oz | 78.86 mL |
| 1/4 cup | 55 g | 1.94 oz | 59.15 mL |
| 1 tbsp | 13.75 g | 0.485 oz | 14.79 mL |
| 1 tsp | 4.583 g | 0.162 oz | 4.929 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Olive oil | 216 g | 7.619 oz | 0.913 |
| Vegetable oil | 218 g | 7.69 oz | 0.9214 |
| Coconut oil | 218 g | 7.69 oz | 0.9214 |
| Mayonnaise (this page) | 220 g | 7.76 oz | 0.9299 |
| Cream cheese | 227 g | 8.007 oz | 0.9595 |
| Water | 236 g | 8.325 oz | 0.9975 |
| Heavy cream | 238 g | 8.395 oz | 1.006 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.