Basic Stat Definitions

AVG

(Batting) Average
H
AB

PA

Plate Appearance
AB + BB + HBP + SH + SF + DI
SH = SACrifice hit
DI = Defensive Interference

OBP

On-Base Percentage
H + BB + HBP
AB + BB + HBP + SF
Note divisor is not PA!

SLG

Slugging Percentage
(S) + (2 × D) + (3 × T) + (4 × HR)
AB
...or...
(H) + (1 × D) + (2 × T) + (3 × HR)
AB
(Because no actual 'S' stat!)

OPS

OBP plus SLG
OBP + SLG

ISO

Isolated Power
SLG − AVG

ERA

Earned Run Average
9 × ER ..or.. 27 × ER
IP Outs
(same as: “ER/9”)

WHIP

Walks + Hits per Inning
BB + H ..or.. 3 × BB + H
IP Outs
(WHIP stands out as “per inning”!)

K/9

Strike-Outs per 9 Innings
9 × K ..or.. 27 × K
IP Outs

BB/9

Walks per Innings 9 Innings
9 × BB ..or.. 27 × BB
IP Outs

K/BB

Strike-Outs per Walk
SO
BB

Win % Calculator

Win Lose
Gms %

OPS & ISO Calculator

AVG OBP SLG
OPS ISO

ERA Calculator

Outs IP ER
ERA

Games Back Calculator

Wins Losses
Team A
Team B
GB

W%

Win Percentage
W
W + L

GB

Games Behind
(WA−WB)+(LB−LA)
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