When calculating slugging percentage, why do the numbers of singles, doubles, and triples get multiplied by 2, 3 and 4, respectively, in the numerator? And, perhaps related, why does the HR count remain as is without a coefficient?

1 Answer 1


I think you just have the definition of slugging percentage wrong. Quoting from Wikipedia:

[Slugging percentage] is calculated as total bases divided by at bats

SLG = ((1B) + (2 x 2B) + (3 x 3B) + (4 x HR)) / AB

i.e. singles are multiplied by one (not two), doubles by two (not three), triples by three (not four) and home runs by four (not one).

  • Got it. Much appreciated. Seems my source was misinformed. I had trouble believing that the weight was as such. Yours makes perfect sense.
    – KidMcC
    Commented May 29, 2016 at 14:28

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