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WHIP Calculator

Walks plus hits per inning pitched: how many batters a pitcher lets on base. Type innings the way box scores show them (6.1 means 6⅓).

Updated · Sources

As in a box score: 6.1 is 6⅓ innings, 6.2 is 6⅔. You can also type 6 1/3.

BaseballPitching

WHIP

1.12

Innings
180⅔
Baserunners
203
Per 9 innings
10.1
Working(48 + 155) ÷ 180⅔ = 1.12

All figures

FigureValue
WHIP1.12
Innings pitched180⅔ (180.2)
Hits allowed155
Walks48
Walks and hits per 9 innings10.1
Share of baserunners from walks24%

WHIP after 6 more innings

Walks and hitsNew WHIP
0 baserunners1.09
2 baserunners1.10
4 baserunners1.11
6 baserunners1.12
8 baserunners1.13

How it works

WHIP is walks plus hits divided by innings pitched. It shows how well a pitcher keeps runners off the bases, whatever happens to them after that. A WHIP of 1.00 means one baserunner an inning, on average.

Hit batters, errors and batters who reach on a fielder’s choice do not count. WHIP also treats a walk and a home run the same, which is why it is read alongside ERA rather than instead of it.

Innings are counted in outs, so 6.1 in a box score is 6⅓ innings and 6.2 is 6⅔. The calculator reads them that way.

The formula

Formula
WHIP = (walks + hits) ÷ innings pitched
baserunners per 9 = WHIP × 9

Worked example

A pitcher allows 155 hits and 48 walks in 180.2 innings (180⅔).

  1. Walks plus hits: 48 + 155 = 203.
  2. 203 ÷ 180⅔ = 1.12.
  3. That is about 10.1 walks and hits per nine innings.

Questions

Do hit batters count in WHIP?

No. Only walks and hits count. Batters hit by a pitch, batters who reach on an error and those who reach on a fielder’s choice are left out.

Do intentional walks count?

Yes. An intentional walk is still a walk, so it counts in WHIP.

What is a good WHIP?

Lower is better. Like ERA, it depends on the league and the season, so compare pitchers from the same ones.

Who came up with WHIP?

Daniel Okrent, the writer who invented rotisserie fantasy baseball, coined it in 1979. He first called it innings pitched ratio.

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Sources

  1. MLB.com glossary: Walks And Hits Per Inning Pitched (WHIP). Formula, and that hit batters, errors and fielder’s choices do not count against WHIP. Coined by Daniel Okrent in 1979.
  2. MLB.com glossary: Innings Pitched (IP). Each out is one third of an inning; no third is credited when a batter reaches on an error.
  3. Major League Baseball. Official Baseball Rules, 2026 edition. Rule 9.02(c)(1) comment (each out is one third of an inning pitched), rule 9.21 (how to compute batting average, slugging percentage, earned run average and on-base percentage, with a worked ERA example) and rule 9.22 (minimum plate appearances and innings to qualify for a title).