Human brain An average adult human brain has a volume of about 1,300 cubic centimeters (80 cubic inches). (more) How Much Does a Human Brain Weigh? Written by Manjishtha Bhattacharyya Manjishtha Bhattacharyya is an editor at Encyclopaedia Britannica. She holds a PhD in zoology from Vidyasagar University, West Bengal, and has more than seven years of experience in science communication... Manjishtha Bhattacharyya Fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated May 1, 2026 •History The adult male human brain typically weighs between 1,300 grams and 1,400 grams (2.87 to 3.08 pounds), making up roughly 2 percent of total body mass. Adult female brains weigh 100 to 150 grams (0.22 to 0.33 pounds) less than adult male brains. Brain weight varies by age, sex, and individual physiology. Men tend to have a slightly larger and heavier brain than women have, although this difference does not correlate with intelligence. Based on...

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