what was the highest ever iq
The highest IQ ever estimated was the 300 IQ of William James Sidis. The highest IQ of a person alive today and recorded is the 228 IQ of Marilyn vos Savant.Both of these IQs â¦ were ratio IQs, meaning they were calculated by figuring out the person's mental age based on how many questions they answered and then using the formula Mental age/chronological age * 100.he more detailed and accurate answer is German polymath Johann von Goethe IQ = 210, the ceiling IQ according to Cox's 1926 book â¦ Early Mental Traits of 300 Geniuses. The true highest ever recorded IQ was Marilyn vos Savant, with an IQ of 228. No four year old has ever been recorded to ever have an IQ higher than 170.