Produce
Chopped Tomato Conversion
Chopped Tomato weighs 180g per US cup.
| Amount | Grams | Ounces |
|---|---|---|
| 1 cup | 180.0 g | 6.35 oz |
| 1/2 cup | 90.0 g | 3.17 oz |
| 1/4 cup | 45.0 g | 1.59 oz |
| 1 tbsp | 11.3 g | 0.40 oz |
| 1 tsp | 3.8 g | 0.13 oz |
| 100 g | 100.0 g | 3.53 oz |
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Chopped tomato weighs 180 grams per cup, and tomatoes' high water content (well over 90%) is exactly why cooking concentrates their flavor so dramatically compared to a fresh, raw tomato — simmering evaporates water and breaks down the fruit's pectin structure, both of which intensify sweetness and umami-forward flavor as a sauce reduces.
This same high water content is why chopped raw tomato has one of the shortest fridge windows among this site's produce entries — just 2-3 days — since the moist, exposed flesh is genuinely hospitable to mold and bacterial growth once cut, more so than a firmer, lower-water vegetable like celery or bell pepper.
Like cherry tomatoes, chopped tomato isn't recommended for freezing raw on this site, since thawed tomato turns notably mushy — but frozen tomato works perfectly well cooked into a sauce, which is exactly why many home cooks freeze a glut of garden tomatoes whole or roughly chopped specifically earmarked for sauce-making later rather than fresh use.
Chopped tomato's cup weight (180g) is on the heavier end for produce because tomatoes are dense and juicy with relatively little trapped air even when diced — that same juiciness is why many recipes call for seeding tomatoes before chopping, to avoid adding excess liquid a sauce or salsa wasn't built to absorb.
Tomatoes are technically a fruit botanically, though used almost exclusively as a savory vegetable in cooking — a distinction that matters more for trivia than for this conversion figure, but explains why tomatoes sometimes show up in produce classification debates.
Vine-ripened tomatoes generally hold more juice than ones picked green and ripened off the vine, which is worth factoring in when a recipe needs a drier chop.
Room-temperature storage generally preserves a tomato's flavor better than refrigeration, which can turn the flesh mealy.
How long does it last?
Storage & shelf life →
Frequently asked questions
Why does cooking a tomato sauce intensify its flavor so much compared to raw tomato?
Tomatoes are well over 90% water, and simmering evaporates much of that water while breaking down the fruit's pectin structure — both effects concentrate the remaining sugars and umami-forward compounds, producing a noticeably richer flavor than raw tomato alone.
Why does chopped tomato spoil faster than most other chopped produce?
Its extremely high water content makes the cut, exposed flesh especially hospitable to mold and bacterial growth, giving chopped tomato one of the shortest fridge windows (2-3 days) among this site's produce entries.
Can I freeze whole tomatoes from my garden to use later?
Yes, and it's a genuinely common approach — freezing tomatoes whole or roughly chopped specifically for later use in cooked sauce works well, since the mushy texture freezing causes doesn't matter once the tomato is going to be cooked down anyway.
Does peeling a tomato before chopping change its shelf life?
Not meaningfully for storage purposes — peeling is mostly a texture choice for a finished dish (removing the tougher skin), and doesn't significantly change how quickly the exposed, cut flesh underneath will spoil once chopped.
Are all tomato varieties (Roma, beefsteak, heirloom) covered by the same conversion figure?
Close enough for practical purposes — variety affects flavor, seed content, and water distribution somewhat, but not enough to meaningfully shift the overall weight-per-cup figure once chopped.