How much percent einstein used his brain?

We have no measurable evidence that Einstein used any more or less of his brain than anyone else - although what he did with his brain is certainly impressive. It is an often repeated bit of urban...

Albert has actually Used 7% oF his Brain

He was so clever that all his work only used up 10% pf his brain and had a spare 90%?

The director of Q TV read a book and he told us what he had read: Einstein was able to use 5% of his brain while we are only using 3% of our brains when we are in deep thinking !!!2 percent .

All of it, just as everyone else does. The "only use 10% of your brain" thing is an urban legend.