1/2 Cup Tomato Paste in Grams
1/2 cup of tomato paste weighs 131 g (spooned and levelled, USDA). 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. Tomato paste is the most concentrated tomato ingredient in the kitchen, which is why a half cup of it is a large amount: the kind a pot of sauce for a crowd, a stew or a marinade all need at once, and why the weight matters more than the volume when a spoonful too much turns a sauce bitter.
Why half a cup of tomato paste is a useful amount
Half a cup of tomato paste is the amount that goes into a sauce for a family dinner, a marinade, a dressing or a glaze, and it is an amount where the cup is at its least convenient. Thick sauces cling to the measure, thin ones splash, and a level half cup of a viscous ingredient can easily be ten grams off depending on how much was left behind. Sauces, stews, marinades and chilli. The table below is built from the published USDA weight for tomato paste measured spooned and levelled, so you can weigh it straight into the pan and skip the sticky cup altogether.
Tomato Paste cups to grams conversion table
| Cups | Grams | Tablespoons (approx.) |
|---|---|---|
| 1/4 cup | 65.5 g | 4.1 g |
| 1/3 cup | 87.3 g | 5.5 g |
| 1/2 cup | 131 g | 8.2 g |
| 2/3 cup | 174.7 g | 10.9 g |
| 3/4 cup | 196.5 g | 12.3 g |
| 1 cup | 262 g | 16.4 g |
| 1 1/2 cups | 393 g | 24.6 g |
| 2 cups | 524 g | 32.8 g |
| 3 cups | 786 g | 49.1 g |
| 4 cups | 1048 g | 65.5 g |
The tablespoon column is a bonus for recipes that call for a spoonful or two: one tablespoon of tomato paste weighs about 16.4 g, and one teaspoon about 5.5 g. A cup is 16 tablespoons, so the numbers in the table are just the cup weight divided by 16, rounded to one decimal place. For small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one.
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. 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 figure is USDA, and the confidence in the value is medium. 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.
Worked examples
A pot of pasta sauce for a crowd
A pot of pasta sauce for a crowd uses 1/2 cup of tomato paste, which is 131 g, fried in oil before the tomatoes go in. The paste has to be fried until it darkens, or the sauce tastes raw and tinny. Weighing 131 g keeps the sauce rich without being bitter, and the paste should be stirred constantly while it fries, or it catches and burns in seconds.
A stew for a cold evening
A stew for a cold evening calls for 1/2 cup of tomato paste, which is 131 g, stirred into the pot with the stock. The paste adds depth and colour, so its weight decides whether the stew is rich or flat. Weighing 131 g keeps the stew balanced, and the paste must be cooked out in the fat first, or it tastes sharp and metallic.
A marinade for a barbecue
A marinade for a barbecue uses 1/2 cup of tomato paste, which is 131 g, mixed with oil, garlic and herbs. The paste clings to the meat and caramelises on the grill, so its weight decides whether the marinade coats evenly or slides off. Weighing 131 g keeps the marinade right, and the meat should be marinated for at least two hours, or the flavour stays on the surface.
When this conversion matters most
This conversion matters most when a sauce has to land in a precise ratio. In a marinade, the weight of tomato paste against the oil and acid decides whether the flavour penetrates or just coats the surface; in a glaze, it decides whether the coating sets or slides off; in a dressing, it decides whether the emulsion holds or splits. A cup measure hides all of that behind the residue left in the cup, so two cooks following the same recipe can end up with visibly different results. Weighing the bowl directly is faster than scraping a cup clean, and it is the only way to know the true amount.
Common mistakes with tomato paste
- Scraping a sticky cup clean. A cup measure of a thick sauce always leaves some behind, so the amount that reaches the pan is less than the amount you measured. Weigh the bowl instead and add the sauce until the scale reads the right number.
- Measuring a cold, thick sauce. Cold sauces are stiffer and trap air, so a cup of cold sauce weighs less than a cup at room temperature. Let the jar warm up, stir it well, then weigh.
- Forgetting that sauces are mostly water or sugar. An extra half cup of sauce adds liquid or sweetness the recipe never planned for. Weigh it and adjust the other ingredients if the pan looks wet or the glaze tastes too sweet.
- Using the cup for a brine or a cure. Brines and sauces that preserve food depend on concentration. A cup measure is far too coarse for that job, so weigh the ingredient and trust the scale.
Storage and handling
Refrigerate after opening; freeze leftovers in spoonfuls. Keeping tomato paste stored properly also keeps its weight per cup stable: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, so a sealed container is not just about freshness, it is about measurement accuracy too. If a bag has been open for months in a humid kitchen, the first thing to do before a precise bake is to weigh the ingredient rather than trusting the cup.
Frequently asked questions
How many grams is 1/2 cup of tomato paste?
1/2 cup of tomato paste weighs 131 g, measured spooned and levelled according to USDA. That is the figure to use when converting a recipe from cups to grams, and it is the value the conversion table on this page is built on.
How do I measure tomato paste without a scale?
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. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight. That gives the closest result to 131 g per half cup, but it is still an estimate: the honest answer is that a scale is the only way to know the exact weight, and a basic digital kitchen scale costs less than a bag of good flour.
Does tomato paste always weigh the same per cup?
No. Brand, grind, moisture and how settled the container is all shift the weight by a few grams, and for some ingredients the swing can be much larger. The 262 g figure is the standard USDA value for tomato paste measured spooned and levelled, and it is the right default, but when a recipe is precise, weigh the ingredient and trust the scale over the cup.
Can I use the same conversion for a different brand of tomato paste?
Yes, as a starting point. The 262 g figure is a standard average for tomato paste, and most brands sit within a few grams of it. If you cook with one brand all the time, weigh one cup of it once and note the number on the bag, and you will have a conversion tuned to your own kitchen.
Why does tomato paste need to be fried before the liquid goes in?
Because raw tomato paste tastes tinny and sharp, while fried paste tastes rich and sweet. Frying the weighed 131 g in oil for a few minutes caramelises the sugars and deepens the flavour, which is why every good sauce recipe starts with the paste in hot oil rather than stirring it into the liquid. Skip the frying and the whole pot tastes of the tin, no matter how long it simmers afterwards.
How should I store tomato paste?
Refrigerate after opening; freeze leftovers in spoonfuls. Good storage keeps the ingredient fresh and keeps its weight per cup consistent, because moisture absorbed from the air adds grams that the recipe did not ask for.
Related conversions
Use the cups to grams converter, tablespoons to grams converter, weight converter, liquid volume converter for instant answers, or browse the cups to grams hub for the full ingredient list. Related pages: Salt in cups to grams, Milk in cups to grams, Butter in cups to grams. See also our disclaimer about approximate conversions.