Ramarni Wilfred, of Loom Grove, Romford, took the Mensa IQ test at Birbeck University and achieved a score of 162.
"I was surprised and very happy when I read the results of my IQ test as I didn't feel very confident - after completing the test," Ramarni was quoted as saying by the 'Romford Recorder'.
Ramarni, his mother Anthea and older sister moved to Romford two years ago but it was a lot earlier that Anthea realised there was something a little special about her son.
"By the time he was three he could read and write and from 18 months we discussed the news and his favourite book was an encyclopedia!" said Anthea.
"Ramarni's score shows he has great potential and we are pleased to welcome him to Mensa. We hope he will enjoy being part of the society and interacting with fellow members," Mensa's chief executive, John Stevenage, said.
Although Einstein never took an IQ test as none of the modern intelligence tests existed during the course of his life, experts believe he had an IQ of around 160.