acalculator

What is my WHIP?

Enter the walks, the hits and the innings pitched as a box score writes them. The WHIP calculator divides the baserunners by the innings; the ERA calculator does the same for earned runs.

Your numbers

Write 6⅓ innings as 6.1 and 6⅔ innings as 6.2.
WHIP
1.05

The WHIP is 1.05 (190 walks plus hits in 180⅓ innings).

Walks plus hits
190
Innings pitched
180⅓
Outs recorded
541
Walks plus hits per 9 innings
9.48

WHIP: 1.05. The WHIP is 1.05 (190 walks plus hits in 180⅓ innings).

How to calculate

Computes a pitcher’s WHIP, the walks plus hits allowed per inning pitched, from walks, hits and innings pitched in box-score notation (6.2 is 6⅔ innings).

Example with the default inputs (Walks 40, Hits 150, Innings pitched 180.1): The WHIP is 1.05 (190 walks plus hits in 180⅓ innings).

Method: WHIP = (walks + hits) ÷ innings pitched, with innings pitched in thirds (outs ÷ 3), so 6.2 is 20 outs, 6⅔ innings.

  • Innings pitched use box-score notation: the digit after the point counts outs (.1 is one out, .2 is two outs). Any other decimal has no answer.
  • Only walks and hits count. Hit batters, errors and fielder’s choices are left out, as in the MLB definition.
  • With walks or hits but no outs recorded the WHIP is infinite, and with no outs and no baserunners there is none; both give no answer.
  • The WHIP is shown to two decimal places, rounded half up from the exact fraction.

Machine-readable copies: Markdown, JSON.

Worked examples

Each example is checked against the calculator on every build.

  1. Walks 50, Hits 150, Innings pitched 200 gives WHIP 1.00, Walks plus hits 200, Innings pitched 200, Outs recorded 600, Walks plus hits per 9 innings 9.Source: MLB.com glossary, Walks and hits per inning pitched (WHIP): WHIP = (walks + hits) ÷ innings pitched. https://www.mlb.com/glossary/standard-stats/walks-and-hits-per-inning-pitched
  2. Walks 40, Hits 150, Innings pitched 180.1 gives WHIP 1.05, Innings pitched 180⅓, Outs recorded 541, Walks plus hits per 9 innings 9.48.Source: MLB.com glossary, Walks and hits per inning pitched (WHIP): WHIP = (walks + hits) ÷ innings pitched. https://www.mlb.com/glossary/standard-stats/walks-and-hits-per-inning-pitched
  3. Walks 1, Hits 2, Innings pitched 6.2 gives WHIP 0.45, Innings pitched 6⅔, Outs recorded 20.Source: MLB.com glossary, Walks and hits per inning pitched (WHIP): WHIP = (walks + hits) ÷ innings pitched. https://www.mlb.com/glossary/standard-stats/walks-and-hits-per-inning-pitched
  4. Walks 1, Hits 0, Innings pitched 8 gives WHIP 0.13, Walks plus hits per 9 innings 1.13.Source: MLB.com glossary, Walks and hits per inning pitched (WHIP): WHIP = (walks + hits) ÷ innings pitched. https://www.mlb.com/glossary/standard-stats/walks-and-hits-per-inning-pitched
  5. Walks 0, Hits 0, Innings pitched 0.1 gives WHIP 0.00, Innings pitched ⅓, Outs recorded 1.Source: MLB.com glossary, Walks and hits per inning pitched (WHIP): WHIP = (walks + hits) ÷ innings pitched. https://www.mlb.com/glossary/standard-stats/walks-and-hits-per-inning-pitched

How it works

WHIP is the number of walks and hits a pitcher allows per inning pitched:

WHIP = (walks + hits) ÷ innings pitched

Innings pitched in box-score notation

Box scores write a partial inning by its outs. The digit after the point is the number of outs, not a decimal fraction:

  • 6 or 6.0 is 6 innings (18 outs)
  • 6.1 is 6⅓ innings (19 outs)
  • 6.2 is 6⅔ innings (20 outs)

The calculator counts the innings in outs: outs = 3 × whole innings + the digit after the point, and innings pitched = outs ÷ 3. So

WHIP = (walks + hits) × 3 ÷ outs

Rules

  • Walks and hits are whole numbers from 0 to 100,000. Innings pitched are from 0 to 100,000.
  • The part after the point must be .0, .1 or .2 (trailing zeros are fine, so 6.10 is 6.1). Any other value, such as 6.3 or 6.25, gives no answer: "Write innings pitched with .1 for one out and .2 for two outs (6.2 is 6⅔ innings); a third out makes a whole inning."
  • With 0 innings pitched and no walks or hits there is no WHIP: "Enter the innings pitched: with no outs recorded there is no WHIP."
  • With 0 innings pitched and walks plus hits above 0 the WHIP is infinite: "The WHIP is infinite: walks or hits were allowed before the pitcher recorded an out."

What the calculator shows

  • WHIP: the exact fraction above, rounded half up to hundredths and always written with exactly two decimal places: 1.00, 0.45, 0.13. It is plain text: digits, a point, two digits, with no thousands separators.
  • Walks plus hits: walks + hits.
  • Innings pitched: the whole innings followed by ⅓ or ⅔ for a partial inning (6⅔; ⅓ alone for one out; 200 for exactly 200 innings).
  • Outs recorded: 3 × whole innings + partial outs.
  • Walks plus hits per 9 innings: (walks + hits) × 27 ÷ outs, rounded half up to at most two decimal places.

Worked examples by hand

50 walks and 150 hits in 200 innings: WHIP = (50 + 150) ÷ 200 = 1.00. Per 9 innings: 9.

40 walks and 150 hits in 180.1 innings: 180.1 is 180⅓ innings, 541 outs. WHIP = 190 × 3 ÷ 541 = 570 ÷ 541 = 1.0536, shown as 1.05. Per 9 innings: 190 × 27 ÷ 541 = 9.48.

1 walk and 2 hits in 6.2 innings: 6.2 is 6⅔ innings, 20 outs. WHIP = 3 × 3 ÷ 20 = 9 ÷ 20 = 0.45.

1 walk in 8 innings: WHIP = 1 × 3 ÷ 24 = 0.125, which rounds half up to 0.13. Per 9 innings: 1.125, shown as 1.13.

No baserunners in 0.1 innings: 1 out, ⅓ of an inning. WHIP = 0 ÷ ⅓ = 0, written 0.00.

Other questions people ask

How do I calculate WHIP?

Add the walks and the hits a pitcher allowed, then divide by the innings pitched. A pitcher who allows 50 walks and 150 hits in 200 innings has a WHIP of 200 ÷ 200 = 1.00.

What do innings like 6.1 and 6.2 mean?

Box scores count a partial inning in outs: 6.1 means 6 innings and 1 out (6⅓ innings) and 6.2 means 6 innings and 2 outs (6⅔). The calculator reads them that way, so 6.2 innings is 20 outs, not 6.2 innings.

Do hit batters or errors count in WHIP?

No. WHIP counts only walks and hits. A batter hit by a pitch, a batter who reaches on an error and a fielder’s choice are left out, even though each puts a runner on base.

What is a good WHIP?

Lower is better, because WHIP counts the baserunners a pitcher allows. Compare a WHIP with the league average for the same league and season: a WHIP well under the average marks a strong season.

What is the difference between WHIP and ERA?

ERA counts earned runs per nine innings, so it depends on what happens after a runner reaches base. WHIP counts the runners who reach by a walk or a hit per inning, whether they score or not. The ERA calculator is the sibling of this page.

Can WHIP be infinite?

Yes. A pitcher who allows a walk or a hit before recording an out has 0 innings pitched, so the WHIP divides by zero. The calculator says it is infinite and shows no number.