I was just curious to know how USNA calculates a candidate's GPA. Do they include community service, ECAs, sports, etc...?

To evaluate each candidate, the Academies ask for many inputs including grades, ECA's, sports, a physical fitness test called the CFA, recommendations and interviews. Each part has points. This is formulated into a point system called the WCS or Whole Candidate Score. The exact formula is not published. I think this is the question you wanted answered. For your GPA, your grades, difficulty of classes, class rank, size of your class (are you ranked 2 out of 10, or 2 out of 400) and school difficulty are all summed together to give you a GPA that can be compared, apples-to-apples, with other candidates. This formula is also not published. This is the question you asked. Best of luck. Do your best and try to take the most difficult classes including AP courses in the diciplines outlined on the UNSA Website. This will help your GPA.

How do they calculate your GPA if you have some post high school education? Do they use all your high school grades, classes, rank, ... as well as college prep grades classes rank...? Or do they just use one or the other? Or, do they use a completely different scale.

Actually, USNA is much more concerned with class standing than GPAs and the only time they use GPAs is when the school refuses to submit class standings. Course load, type courses, and individual grades are inputted individually into the whole person equation to obtain a final assessment. The reason this is worth bearing is due to the fact that many of the 'tricks' which high school students use to inflate their GPA may actually prove detrimental to their overall whole person assessment. Taking difficult courses, especially math and science, and doing well in them will always pay off in the long run.

^^^^ Agree 100%. They also look at the quality of your h.s. -- in terms of the percentage of students that typically go on to college. That can help those who stand a bit lower in their class at a very competitive school.

Might help explain why a candidate with a gpa of 3.3 wins an appointment while another with a gpa of 3.9 is rejected?

Oops. Somehow I meant to post this after 85's last post and it ended up on the wrong thread. My keyboard must be crosswired:

See my Post # 2. They use your GPA and, factoring in the difficulty of your HS, how many students it sends to 4 yr colleges, etc. and guesstimates, rather accurately, what your class standing is.

USNA will call the school and try to convince it to provide a ranking or at least some idea of where you rank (i.e., top 25%). If the school refuses, they will do as Mombee says and look at GPA, classes taken, strength of school, etc. and do their best to come up with a rough idea of where you stand in the class.

why do some schools refuse to rank? i mean mine does but it just keeps it private unless you ask what yours is.