100 Grams Tomato Paste in Cups
100 g of tomato paste is 0.38 cups (spooned and levelled, USDA). The working is simple: 100 divided by 262 g per cup is 0.38, so 100 g of tomato paste measures about 3/8 cup. Concentrated cooked tomatoes; intensely savoury. 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.
Precision is the reason this page exists, because tomato paste is one of those ingredients where a careless cup can quietly change a recipe, and the difference between a good result and a disappointing one is often a tablespoon too much or too little of exactly this ingredient.
Tomato Paste grams to cups conversion table
| Grams | Cups (decimal) | Nearest measure |
|---|---|---|
| 25 g | 0.1 cups | 1/8 cup |
| 50 g | 0.19 cups | 1/4 cup |
| 75 g | 0.29 cups | 1/4 cup |
| 100 g | 0.38 cups | 3/8 cup |
| 125 g | 0.48 cups | 1/2 cup |
| 150 g | 0.57 cups | 5/8 cup |
| 200 g | 0.76 cups | 3/4 cup |
| 250 g | 0.95 cups | 1 cups |
| 300 g | 1.15 cups | 1 1/8 cups |
| 400 g | 1.53 cups | 1 1/2 cups |
| 500 g | 1.91 cups | 1 7/8 cups |
The decimal column is exact arithmetic from the 262 g per cup figure, while the nearest-measure column is what you would actually reach for in the kitchen. A value like 0.38 cups is not a useful instruction on its own, so the table rounds it to the nearest practical measure, which for 100 g is 3/8 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 Tomato Paste
| Cups | Grams |
|---|---|
| 1/4 cup | 66 g |
| 1/3 cup | 87 g |
| 1/2 cup | 131 g |
| 2/3 cup | 175 g |
| 3/4 cup | 196 g |
| 1 cup | 262 g |
| 1 1/2 cups | 393 g |
| 2 cups | 524 g |
| 3 cups | 786 g |
Read this table the other way round whenever a recipe is written in cups and your scale reads grams. One cup is 262 g, half a cup is 131 g, and a quarter cup is 66 g, all measured spooned and levelled. Because the two tables are calculated from the same 262 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
A cake that needs 150 g of tomato paste
150 g divided by 262 g per cup is 0.57 cups, or about 5/8 cup. Measure it as 5/8 cup, using the spooned and levelled method, rather than guessing a heaped cup, because a heaped cup is not a measured amount at all. In a cake the exact amount is doing real work, so measure it as a separate amount rather than topping up a cup by eye. If the cake is a special occasion bake, weigh the 150 g and skip the cups entirely.
A 50 g garnish or topping
50 g of tomato paste is 0.19 cups, or about 1/4 cup. Small amounts are where cup measures are weakest, because the error on a quarter cup is proportionally larger than the error on two cups, and a topping spread unevenly hides the mistake until the dish is served. For amounts under 100 g, a tablespoon measure is often steadier than a cup: 100 g is about 6.1 tablespoons, so 50 g is about half that, and a level tablespoon is easier to repeat than a quarter cup.
Doubling a recipe from 100 g to 200 g
Doubling is the one scaling operation cups handle well, because 100 g is 0.38 cups and 200 g is 0.76 cups, so the doubled recipe takes two lots of 3/8 cup. The trap is doubling the leavening and the salt at the same time, which do not scale the same way, so double the tomato paste and the other bulk ingredients, then check the leavening and seasoning separately before you bake.
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 262 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.
When the conversion matters most
In a recipe where tomato paste provides structure, sweetness, bulk or binding, the gram figure is the one to trust, and the cup figure is the fallback for days when the scale is in a drawer or its battery has died. Cakes, muffins and other batters are the least forgiving, because the ratio of wet to dry ingredients decides whether the crumb is tender or tough, and a cup of tomato paste measured two different ways can differ by a fifth of its weight. Sauces and dressings are more forgiving, since you can taste and adjust as you go, and a soup or a stew will absorb a small error without complaint. The practical rule is simple: weigh when the recipe cannot be fixed after mixing, and measure by cup when you can taste, see and correct the result before it is finished. Either way, use the same method every time, because a consistent cup is a predictable cup, even if it is not a perfect one.
Common mistakes with tomato paste
The failure mode to watch for is drift: the first cup is measured carefully and the second is scooped in a hurry, so the two cups hold different weights and the total is wrong in a way no table can correct. The second failure is the heaped tablespoon, because a recipe that says two tablespoons and gets two heaped tablespoons has quietly gained half a tablespoon extra, and with a dense ingredient like tomato paste that is a real change. The third failure is trusting a conversion found for a different ingredient, since tomato paste at 262 g per cup is nothing like flour at 120 g or sugar at 198 g, and borrowing a neighbour's number is how a recipe ends up dry, wet, flat or oversweet. Keep this page's number with this ingredient and no other.
Storing tomato paste
Refrigerate after opening; freeze leftovers in spoonfuls. Sauces, stews, marinades and chilli. Keeping tomato paste 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
How do I measure 100 g of tomato paste without a scale?
Spoon tomato paste into a measuring cup spooned and levelled style until it is heaped, then level it with a straight knife. That gives you about 3/8 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 tomato paste?
One tablespoon is one sixteenth of a cup, so one tablespoon of tomato paste weighs about 16.4 g, and 100 g is about 6.1 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 tomato paste?
One US cup of tomato paste, measured spooned and levelled, weighs 262 g according to USDA. That is the figure every number on this page is calculated from, so one cup is 262 g, half a cup is 131 g, and a quarter cup is 66 g.
Does packing change the answer?
Yes, and for some ingredients it changes it a lot. The 262 g figure assumes the spooned and levelled method, so a packed cup weighs more and a loosely filled cup weighs less. If your tomato paste has settled, been pressed down or absorbed moisture, the cup will be heavier than the table says, which is another reason to weigh it when the result matters.
What is 100 g of tomato paste in ounces?
100 g is 3.53 oz, because one ounce is 28.35 g. Ounces are a weight, like grams, so that conversion is exact, unlike the cup conversion, which depends on density. If your scale can switch units, weigh in grams and read the ounces from the same measurement rather than converting twice.