What is the average size and weight of the kidneys?

The average size and weight of the kidneys is typically described as being approximately the size of a fist and weighing around 5 ounces. This corresponds with the anatomical understanding that the adult kidney measures about 10 to 12 centimeters in length and is shaped somewhat like a bean or fist.

This size is important for various medical assessments, including imaging studies and during surgical procedures, to help professionals gauge normal function or identify abnormalities. The biological significance of the weight and size of the kidneys also relates to their ability to filter blood, produce urine, and maintain fluid and electrolyte balance in the body.

Understanding the average metrics provides a baseline to recognize what is normal versus that which may indicate pathological conditions or adaptations within the kidneys.