The TOEFL test (Test of English as a Foreign Language) measures ability to use and understand English at a university level. It also evaluates how well you combine your listening, reading, speaking and writing skills to perform academic tasks.
Those who have a university degree in programmes taught in English in an English speaking country or have other equivalent English language tests may be exempted from the TOEFL test. TOEFL results are available about two weeks after the test and are valid for two years. The test costs approx. 215 USD.