Equivalent average

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EqA = \frac{H+TB+{1.5 \cdot (BB+HBP)}+SB+SH+SF}{AB+BB+HBP+SH+SF+CS+\frac{SB}{3}}

Equivalent Average (EqA) is a baseball metric invented by Clay Davenport, and intended to express the production of hitters in a context independent of park and league effects. It represents a hitter's productivity using the same scale as batting average. Thus, a hitter with an EqA over .300 is a great hitter, while a hitter with an EqA of .220 or below is poor. An EqA of .260 is defined as league average.

(In the formula, the abbreviations are: H=Hit, TB=Total bases, BB=Bases on balls (walks), HBP=Hit by pitch, SB=Stolen base, SH=Sacrifice hit (typically, sacrifice bunt), SF=Sacrifice fly, AB=At bat, CS=Caught stealing.)