500 grams of grapes is 1.1 lb (500 g). It is about the size of a quart and fills a volume of 3.52 cups (833 mL).

In kitchen measures
3.52 cups
169 tsp · 56.4 tbsp · 3.52 cups
about the size of a quart
Density estimated by AI from typical values. Grapes typically ranges 0.55–0.65 g/mL depending on how it's packed. A firmly packed scoop weighs more.