Steve Pond over at The Wrap has written an extensive, invaluable cheat sheet that lists the members per category and how many votes are needed to secure a nod. Best Picture is the highest, over 500 votes needed to make it into the top ten. Acting comes next, with 201. Here is how Steve breaks it down (but you should pop over to his column to read the full article – much interesting and useful info there):
Acting awards:
Members: 1,205 active
Votes required for nomination: 201
Art direction:
Members: 374 members (but 109 are costume designers, who vote in a separate category; that means that 265 members are eligible to vote for the art direction Oscar)
Votes required for nomination: 45Cinematography:
Members: 201
Votes required for nomination: 34
Costume design:
Members: 109 (from the art directors branch)
Votes required for nomination: 19Directing:
Members: 366
Votes required for nomination: 62Film editing:
Members: 221
Votes required for nomination: 37Original score:
Members: 234
Votes required for nomination: 40Sound editing, sound mixing:
Members: 405
Votes required for nomination: 68Original screenplay, adapted screenplay:
Members: 382
Votes required for nomination: 64Best picture:
Members: 5,777
Votes required for nomination: 526