In theory IQ bigger than 150 is considered being at genius level. But this is not true. Only if we are considering a lot of other things, and not only IQ. For example EQ. High EQ and medium level IQ is more probable to give results that extremely high IQ and low EQ. And this was just a simplified example. It is a lot more. One can be genius in mechanics, sports or dance even with an average IQ.
https://www.quora.com/What-is-the-IQ-of-a-genius
Some tests that can qualify an individual for Mensa membership are administered by private psychologists. The Differential Ability Scales, or DAS, test, Reynolds Intellectual Assessment Scales, and Stanford Binet test are all such tests, and all require an IQ of 132 or higher for Mensa admission.
https://www.reference.com/world-view/mensa-iq-levels-a3b10e4aafc9573c
Mensa accepts scores from more than 200 tests, including many IQ tests, to determine qualification for membership; for example, those receiving an IQ score of 132 or higher on the California Test of Mental Maturity, or CTMM, can become members of Mensa.
https://www.reference.com/world-view/mensa-iq-levels-a3b10e4aafc9573c
The average score on an IQ test is 100. Sixty-eight percent of IQ scores fall within one standard deviation of the mean. So that means that the majority of people have an IQ score between 85 and 115. 1 to 24 - Profound mental disability.
https://www.verywell.com/what-is-a-genius-iq-score-2795585
A normal intelligence quotient (IQ) ranges from 85 to 115 (According to the Stanford-Binet scale). Only approximately 1% of the people in the world have an IQ of 135 or over. Genius or near-genius IQ is considered to start around 140 to 145. Less than 1/4 of 1 percent falls into this category. Around a century ago, it was a common practice to tag high IQ people with the genius label.
http://www.iqtestexperts.com/making-genius.php
Only approximately 1% of the people in the world have an IQ of 135 or over. Genius or near-genius IQ is considered to start around 140 to 145. Less than 1/4 of 1 percent falls into this category. Here are some common designations on the IQ scale: 115-124 - Above average.
http://www.iqtestexperts.com/making-genius.php
IQ scores range from one to over 200 with the average score being 100, as of 2014. Sixty-eight percent of all IQ scores are within one standard deviation of the average. This means that most people have an IQ score between 85 and 115.
https://www.reference.com/world-view/mensa-iq-levels-a3b10e4aafc9573c
Some intelligence quotient tests administered by the military can be used for admission in to the High IQ Society.. Scores of 98 or better on the AFQT or 136 or better on the Army GCT or the GT can be used for admission purposes. A score of 68 on the Navy GCT can be used to qualify for Mensa.
https://www.reference.com/world-view/mensa-iq-levels-a3b10e4aafc9573c
Depending on the source you go by, IQ 140 is where genius starts; high IQ starts at 130; 150 is generally considered profound genius. Anything much more than 150 is usually considered unmeasurable (or immeasurably high) genius and is accordingly unreliable to measure at that level.
https://www.quora.com/What-is-the-IQ-of-a-genius
Other IQ tests that can be used for Mensa qualification include the Stanford Binet 5 (score of 130 or more) and the Wechsler Adult and Children Scales (score of 130 or more needed). Scores of 98 or better on the AFQT or 136 or better on the Army GCT or the GT can be used for admission purposes.
https://www.reference.com/world-view/mensa-iq-levels-a3b10e4aafc9573c
what is a genius level iq
A genius intelligence quotient level is from 140 to 145.   The Genius IQ is considered to be around 140 to 145.