100 Grams Mayonnaise in Cups
100 g of mayonnaise is 0.45 cups (spooned and levelled, USDA). The working is simple: 100 divided by 220 g per cup is 0.45, so 100 g of mayonnaise measures about 1/2 cup. Emulsified oil, egg and vinegar spread. All the figures on this page are approximate conversions based on the USDA value, so when a recipe really matters, verify with a kitchen scale.
Batch cooking is where this conversion pays for itself, because a recipe that works for one tray usually needs to work for three, and the only way to keep three batches identical is to start from grams and convert to cups once, rather than measuring each batch by eye and hoping they match.
Mayonnaise grams to cups conversion table
| Grams | Cups (decimal) | Nearest measure |
|---|---|---|
| 25 g | 0.11 cups | 1/8 cup |
| 50 g | 0.23 cups | 1/4 cup |
| 75 g | 0.34 cups | 1/3 cup |
| 100 g | 0.45 cups | 1/2 cup |
| 125 g | 0.57 cups | 5/8 cup |
| 150 g | 0.68 cups | 2/3 cup |
| 200 g | 0.91 cups | 7/8 cup |
| 250 g | 1.14 cups | 1 1/8 cups |
| 300 g | 1.36 cups | 1 3/8 cups |
| 400 g | 1.82 cups | 1 7/8 cups |
| 500 g | 2.27 cups | 2 1/4 cups |
The decimal column is exact arithmetic from the 220 g per cup figure, while the nearest-measure column is what you would actually reach for in the kitchen. A value like 0.45 cups is not a useful instruction on its own, so the table rounds it to the nearest practical measure, which for 100 g is 1/2 cup. The worked examples below show how to handle the in-between amounts without a calculator, and the reverse table underneath lets you go the other way, from cups back to grams.
Cups to grams for Mayonnaise
| Cups | Grams |
|---|---|
| 1/4 cup | 55 g |
| 1/3 cup | 73 g |
| 1/2 cup | 11 g |
| 2/3 cup | 147 g |
| 3/4 cup | 165 g |
| 1 cup | 22 g |
| 1 1/2 cups | 33 g |
| 2 cups | 44 g |
| 3 cups | 66 g |
Read this table the other way round whenever a recipe is written in cups and your scale reads grams. One cup is 220 g, half a cup is 11 g, and a quarter cup is 55 g, all measured spooned and levelled. Because the two tables are calculated from the same 220 g figure, they always agree with each other, which is the point of using one source for the whole page rather than mixing figures from different charts.
Worked examples
Three batches from 300 g
300 g of mayonnaise is 1.36 cups, which is three lots of 100 g, or three lots of 0.45 cups. Weigh the 300 g, split it into three equal 100 g portions, and each batch gets exactly the same amount, which is the only way three batches of the same recipe come out identical. Label each portion as you split it, so there is no confusion later in the session.
A freezer stash of 500 g
500 g is 2.27 cups, or five lots of 0.45 cups, and freezing it in 100 g portions means every future recipe that calls for 100 g is one bag away from ready. Thaw the bag, measure it if the recipe is written in cups, and the conversion is the same one you used today, because the weight does not change in the freezer.
A double batch of 200 g
Doubling from 100 g to 200 g takes mayonnaise from 0.45 cups to 0.91 cups, and the doubled batch needs a larger container and a longer cooking time, so check for doneness rather than trusting the clock. The conversion is the easy part; the container and the timing are where double batches usually go wrong.
How the weight was measured
Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off, unless the ingredient is a liquid, in which case it is poured to the line. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight.
The source for the 220 g per cup figure is USDA, and the confidence in the value is high where the source is a published ingredient chart and medium where it is a USDA food-data value. USDA publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup. Use the table above, which follows the same source, and your conversions will be consistent with the recipes on this site.
Batch cooking with Mayonnaise
When you cook in batches, weigh the total amount of mayonnaise once, then divide it by weight into equal portions before you start measuring cups, because equal weights give equal batches and equal cups only do so if every cup is measured identically. A 500 g batch of mayonnaise is 2.27 cups in total, which divides into five lots of 100 g, or five lots of 0.45 cups, and each lot will behave the same way in the oven or on the stove. Freeze the portions you will not use this week in labelled bags with the weight written on the outside, because a bag labelled 100 g is a recipe amount you can use straight from the freezer, while an unlabelled bag is a guessing game. Finally, keep notes: the first time you batch a recipe, write down the cup measures that worked, and the second time you will not need this page at all, which is exactly how a conversion table is supposed to work.
Common mistakes with mayonnaise
The batch-cooking mistake is measuring each batch separately with cups, so the first batch gets a careful cup and the third gets a hurried scoop, and the three batches come out different. Weigh once, divide by weight, and the batches match. A second mistake is scaling the batch in cups and rounding each ingredient differently, so the ratios drift as the batch grows, and the large batch tastes different from the small one for no obvious reason. A third mistake is forgetting to scale the cooking vessel: 2.27 cups of mayonnaise needs a bigger bowl, a bigger tin or a bigger pot than 0.45 cups, and a batch that overflows its container is a batch that has to be remade.
Storing mayonnaise
Refrigerate after opening; use within 2 months. Sandwiches, dressings, dips and coleslaw. Keeping mayonnaise in good condition protects the conversion as well as the flavour, because a stale, damp or clumped ingredient does not weigh the same per cup as a fresh one, and the table above assumes the ingredient is in its normal, dry, free-flowing state. If a bag has been open for months, check it before you measure, and replace it if it smells off, feels damp or has changed colour.
Frequently asked questions
Is the figure on this page exact or approximate?
Approximate. All density conversions are approximate, because the weight of a cup varies with measuring method, moisture, brand and how finely the ingredient is ground or chopped. The figure is accurate enough for everyday cooking and for most baking, and when it has to be exact, verify it with a kitchen scale.
Is 100 g of mayonnaise exactly 0.45 cups?
To two decimal places, yes: 100 divided by 220 is 0.45, and that is the figure the table uses. It is still an approximate conversion, because the true weight of a cup depends on how it is measured, so treat 0.45 cups as the working answer and weigh the ingredient with a kitchen scale when the recipe really matters.
How do I measure 100 g of mayonnaise without a scale?
Spoon mayonnaise into a measuring cup spooned and levelled style until it is heaped, then level it with a straight knife. That gives you about 1/2 cup per 100 g. Do not scoop the cup through the bag, because scooping packs the ingredient and adds weight, and do not use a mug, because mugs are not standard cups.
How many tablespoons is 100 g of mayonnaise?
One tablespoon is one sixteenth of a cup, so one tablespoon of mayonnaise weighs about 13.8 g, and 100 g is about 7.3 tablespoons. Tablespoons are a steadier measure than cups for small amounts, so if your recipe needs less than half a cup, count tablespoons instead.
How many grams is 1 cup of mayonnaise?
One US cup of mayonnaise, measured spooned and levelled, weighs 220 g according to USDA. That is the figure every number on this page is calculated from, so one cup is 220 g, half a cup is 11 g, and a quarter cup is 55 g.