Question: 1/2 small onion equals how many cups?
Answer: Small: A small onion should weigh around 4 ounces, should fit pretty easily in your hand, and should yield about 1/2 cup once chopped. Medium: A medium onion is about twice as big as a small one, weighing it at roughly 8 ounces and yielding (you guessed it) about a cup once chopped.