According to the United States Department of Agriculture, the average weight of a carrot varies between 50 and 72 grams, depending on its length. A medium-sized carrot weighs about 61 grams.
The best way to estimate the weight of a carrot is by knowing its length. A carrot that is 5.5 inches or shorter in length, typically weighs about 50 grams or less; this is considered a small carrot. A carrot that is 7.25 inches or longer should weigh at least 72 grams. A cup of carrots varies in weight based on how it is prepared. A cup of sliced carrots weighs around 122 grams, a cup of grated carrots weighs approximately 110 grams and a cup of chopped carrots weighs around 128 grams.