First you need to understand that an IQ test does not necessarily measure how smart you are, instead it attempts to measure your ability to learn. You should also know that there is no standard for IQ tests, meaning that no two tests will give you the same results. One test could say you are a genius while the other will say you are average.
If you are serious about measuring your intelligence, you need to go to the Mensa website and start you assessment. Mensa is one of the best know names in the Intelligence business. A link to their website is provided at the bottom of this article.
You should have a second opinion. Below I provided another respected IQ evaluating company. Compare the results. A link is provided at the bottom of this article
Now it's time to have some fun. There is a "Genius" test at coolmath.com. A link is provided at the bottom of this article. I give this test to my students every year, it always good for a few laughs.