Rakeback Calculator.com is a free service used to help aid in understanding rakeback. Keep in mind that rake has many variables that change from site to site when they determine how they calculate rake. Because of this, it is almost impossible to come up with a perfect calculation. The rakeback calculator is therefor used as a best guess in most cases. It is usually pretty accurate but in all honesty its main purpose it so show non rakeback players what they are missing. If this is accomplished then the calculator has done its purpose. Stopped another player from playing without their rakeback!