About 8.5 ounces (240 grams)
Around 500 grams are in a large brown onion.
Small onion = 4 ounces by weight or about ½ cup chopped Medium onion = 8 ounces, or about 1 cup chopped Large onion = 12 ounces, or about 1½ cups chopped Jumbo onion = 16 ounces, or about 2 cups chopped
1 small equals 1/4 cup chopped 1 medium equals 1/2 cup chopped 1 large equals 1 cup chopped Hope this helps! Found this answer at http://home.answerbox.net/garden-search-onion%0A%0A1-396545368.htm
About 120 grams of dried onion.
The web references vary and show medium onions as 3/4 to 1 cup chopped and large onions as 1 to 1.5 cups chopped.
I do not detect any flavor differences in the two.
About half of a cup (slightly more, depending on what you call "small"). -Rachel
For a medium onion, figure about a half cup.
Onions can be from about 20 gm up to over 400 gm
put it on the scale and you will have the anwer.
Have you ever noticed how onions can be many sizes ? 1 chopped onion could be 0.5 cup to about 1.5 cup