One gram of mayonnaise is 0.0045454545 cups, so converting grams of mayonnaise to cups means multiplying by 0.0045454545. That factor is specific to this ingredient — it comes from its density, not from any relationship between the two units.
Water is the yardstick: 1 mL of it weighs 1 g. Mayonnaise comes in at 0.92989 g per mL, or 92.99% of water, which is why a cup of it is 220 g rather than 236.6 g. Volume and weight only line up for water, and only in metric.
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.
What the number depends on: 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
grams- The amount of mayonnaise you are converting, in grams
0.00454545454545- Cups per gram for mayonnaise, from its density of 0.92989 g/mL
cups- The equivalent quantity in cups
How it works, step by step
- Enter the quantity in grams.
- It is multiplied by 0.00454545454545, the cups-per-gram figure for mayonnaise.
- The result appears in cups, with a second reading in tbsp beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
50 g of mayonnaise in cups
Take 50 g of mayonnaise: 50 × 0.0045454545 gives 0.227273 cups. Doubling the batch takes it to 0.454545 cups, because the relationship is a straight proportion once the density is known.
150 g of mayonnaise in cups
150 g of mayonnaise weighs out at 0.681818 cups. Divide 0.681818 by 0.0045454545 and you get back to 150 g, which is the quickest check that the factor is the right way up.
500 g of mayonnaise in cups
Take 500 g of mayonnaise: 500 × 0.0045454545 gives 2.27273 cups. Doubling the batch takes it to 4.54545 cups, because the relationship is a straight proportion once the density is known.
How to read your score
Frequently asked questions
How many cups are in 1 g of mayonnaise?
One gram of mayonnaise is 0.0045454545 cups. Half that quantity is 0.00227273 cups and double it is 0.00909091 cups, 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 much does 2 cup of mayonnaise weigh?
2 cup of mayonnaise comes to 440 g, or 440 grams. This page runs that calculation in reverse — enter a weight and it returns the volume — and the cups-to-grams page does it in the direction the question is usually asked.
Mayonnaise in grams and cups
| Grams | Cups | Unrounded |
|---|---|---|
| 5 g | 0.0227273 cup | 0.02272727273 |
| 10 g | 0.0454545 cup | 0.04545454545 |
| 25 g | 0.113636 cup | 0.1136363636 |
| 50 g | 0.227273 cup | 0.2272727273 |
| 100 g | 0.454545 cup | 0.4545454545 |
| 125 g | 0.568182 cup | 0.5681818182 |
| 150 g | 0.681818 cup | 0.6818181818 |
| 200 g | 0.909091 cup | 0.9090909091 |
| 250 g | 1.13636 cup | 1.136363636 |
| 300 g | 1.36364 cup | 1.363636364 |
| 500 g | 2.27273 cup | 2.272727273 |
| 1000 g | 4.54545 cup | 4.545454545 |
Based on 220 g per cup of mayonnaise. One gram of mayonnaise is 0.0045454545 cups.
| 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.