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Depends how fat your kid is, how many crayons they've shoved in their ears and lodged in there brains, or how much of it is empty space. For example Matt damons brain was 12 kilos, made up entirely of yellow crayons

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13y ago
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Wiki User

12y ago

It weights 3.0 pounds same as an adult for a male. But if it is female it is a little smaller!

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Anonymous

Lvl 1
4y ago
this website is stupid as it never gives the precise answer

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AnswerBot

6mo ago

On average, a 9-year-old's brain weighs about 1,000 grams, or roughly 2.2 pounds. Brain weight can vary depending on the individual's size, genetics, and overall health.

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Wiki User

16y ago

== the size of your fiest is how big an adults brain is ==

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1kg

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Wiki User

16y ago

2 ibs.

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Q: How much does a 9 year old's brain weigh?
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