How much does a grain of rice weigh?

Answer:

Rice grains vary widely. Mostly they weight 20-30 mg, although experimental breeding has produced them as large as 78 mg http://www.shigen.nig.ac.jp/rice/rgn/vol5/v5VI33.html

Note: There are comments associated with this question. See the discussion page to add to the conversation.
First answer by Draipelaman. Last edit by Draipelaman. Contributor trust: 30 [recommend contributor recommended]. Question popularity: 40 [recommend question].