Quick Answer
200 grams equals approximately 0.85 cups of water.
For common kitchen ingredients, 200 grams is about 1.6 cups of all-purpose flour, 1 cup of granulated sugar, 0.91 cups of packed brown sugar, 0.88 cups of butter, and 1.08 cups of uncooked white rice.
The exact cup amount changes by ingredient because grams measure weight and cups measure volume.