by BuckyF on October 11th, 2003

BuckyF

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How is slugging percentage calculated?

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  • by carbonite on November 12th, 2003

    carbonite

    The formula (from baseball-almanac.com) is:

    Number of (Singles + [2 x Doubles] +[ 3 x Triples] + [4 x Home Runs]) divided by At Bats.

    Walks count as plate appearances, but NOT as At Bats.Only hits are used in calculating SLG%.

    For example, in 2003 Barry Bonds had 133 hits in 390 At Bats. The breakdown was as follows:

    45 HR
    1 3B
    22 2B
    65 1B

    Using the above formula we get (65 + [2 x 22] + [3 x 1] + [4 x 45]) / 390

    (65 + 44 + 3 + 180) / 390
    (292) / 390 = .7487 SLG%

    MLB.com also lists the SLG% as .749 Walks do not come into the calculation at any point.

    Comments
    • Yup, SLG uses total bases, and total bases counts only singles, doubles, triples, and homeruns. Not walks.

      Joshua Zambrano

      by Joshua Zambrano on April 14th, 2004

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