A 14.5-ounce can of diced tomatoes typically yields about 1.75 to 2 cups when drained. This is because a standard cup of diced tomatoes weighs approximately 7 to 8 ounces. Therefore, you can expect to get close to 1.75 cups when the tomatoes are drained.
1 cup = 8 ounces regardless of what you are measuring.
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2 cups of tomatoes equal about 1 pound.
Cups are a measurement for size where as ounces is weight. So the answer varies by brand and product. The best way to figure it out is to look at the back of the can and see the suggested serving sizes which is usually written in cup measurements. If looking to replace a can one and a quarter cups of diced fresh tomatoes and one cup of liquid will do the trick.
There are 8oz. in 1 cup, so that would make 96 oz. in 12 cups.
it takes about 3 cups of tomato paste to make one pound.
On average, four diced Roma tomatoes will equal one cup. One cup of diced Roma tomatoes contains 40 calories and 0 grams of fat.
there are 1.74 cup in 400 grams
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About 1lb of tomatoes will yield 2 cups chopped tomatoes. So in your case, 1/2 lb should do it.
Fine chopped would be about 3.8 cups.