According to the California Raisin Marketing Board at www.calraisins.org/professionals/health/faq_nutrition.cfm:
1 cup of fresh grapes weighs 126 grams; therefore, one quart of grapes, which equals 4 cups, would weigh (126x4) 504 grams.
A quart of water is 907 grams
Two hundred grams is equal to 0.18 quarts. One quart is equal to 1101 grams and one gram is equal to 0.0009 quarts.
A pint is a pound. There are 2 pints in a quart. So 1 lb. of grapes is a half a quart.
907.185 grams in a US quart.
Individual grapes would be weighed in grams but bunches of grapes would be weighed in kilograms.
The number of cups of grapes in 250 grams can vary slightly depending on the size of the grapes, but on average, 250 grams of grapes is approximately 1.5 to 2 cups. Generally, a cup of grapes weighs around 150 to 170 grams. Therefore, you can estimate that 250 grams would fill about 1.5 cups.
There are 0.25 gallons in a quart.
2 A quart is equal to 32 oz.
That is 3.3 ounces
You can say: "How many milligrams are in a cup of grapes?". Since a milligram is a unit of mass, you might also say: "What is the mass, in milligrams, of a cup of grapes?"
946.35cc per US quart.
2 pints is 1 quart.