How Much Does an Adult Human Brain Weigh?
Answer – The adult human brain weighs about 3 pounds (i.e., approximately 1300–1400 grams).
Explanation:
A person’s brain weight is influenced by their sex, age, and overall health. An average adult male brain weighs approximately 1375 g and is 10 percent larger than an adult female brain, which weighs approximately 1275 g. At birth, a baby’s brain is about 25% of the adult brain weight. It continues to grow and develop during childhood and adolescence. After an average age of 40 years, the brain’s weight starts declining.
