Brain Size

How big is your brain?

It is as big as your two fists put together. It is almost full grown when you are 7 years old. It weighs about 3 pounds when fully grown.

Did you know that the brain does not have to be big to be smart? In fact, Albert Einstein's brain was smaller than a normal adult brain usually is.

Click here to find the sizes of other animal brains.

Click here to find out if bigger brains are better brains.