Here are the links to all the information you need for your grading.
These are the requirements as an adult. Children's grades are broken down further to "bars"
Green Belt - 6th Kyu
Blue Belt - 5th Kyu
Purple Belt - 4th Kyu
Brown Belt - 3rd Kyu
Brown Belt - 2rd Kyu
Brown Belt - 1st Kyu
Black Belt - Shodan Ho
Black Belt - Shodan
Black Belt - Nidan
Kimura's Combinations.