WHIP Calculator — Walks + Hits per Inning
Calculate WHIP (Walks plus Hits per Inning Pitched) for baseball pitchers. Evaluate pitching performance with instant results and ratings.
WHIP Calculator — Walks + Hits per Inning
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Formula: WHIP = (Walks + Hits Allowed) / Innings Pitched
Worked example — WHIP: 0.952 (Elite) — Fewer than 1 baserunner per inning
Formula
WHIP = (Walks + Hits Allowed) / Innings Pitched
WHIP measures the average number of baserunners a pitcher allows per inning through walks and hits. Lower values indicate better pitcher performance. It does not include hit-by-pitches or errors.
Worked Examples
Example 1: Ace Starter Season
Problem:A starting pitcher has 45 walks, 155 hits allowed over 210 innings pitched. Calculate their WHIP.
Solution:WHIP = (Walks + Hits) / Innings Pitched WHIP = (45 + 155) / 210 WHIP = 200 / 210 WHIP = 0.952 Baserunners per 9 innings = 0.952 x 9 = 8.57
Result:WHIP: 0.952 (Elite) — Fewer than 1 baserunner per inning
Example 2: League Average Pitcher
Problem:A pitcher has 65 walks and 195 hits allowed in 180 innings. Calculate their WHIP.
Solution:WHIP = (Walks + Hits) / Innings Pitched WHIP = (65 + 195) / 180 WHIP = 260 / 180 WHIP = 1.444 Baserunners per 9 innings = 1.444 x 9 = 13.0
Result:WHIP: 1.444 (Poor) — About 13 baserunners per full game
Frequently Asked Questions
What is WHIP in baseball?
WHIP stands for Walks plus Hits per Inning Pitched, and it is one of the most commonly used pitching statistics in baseball. It measures the average number of baserunners a pitcher allows per inning through walks and hits combined. A lower WHIP indicates a more effective pitcher who limits opposing batters from reaching base. The statistic was invented by writer Daniel Okrent in 1979, originally calling it Innings Pitched Ratio. WHIP has become a standard evaluation metric in both traditional scouting and modern sabermetric analysis, appearing on every major baseball statistics website and broadcast.
What is a good WHIP for a pitcher?
WHIP values are generally evaluated on a sliding scale. An elite pitcher will have a WHIP at or below 1.00, meaning they allow fewer than one baserunner per inning on average. A WHIP between 1.00 and 1.10 is considered excellent and typical of ace-caliber pitchers. Values between 1.10 and 1.20 are above average, while the league average typically hovers around 1.25 to 1.30. A WHIP above 1.40 is generally considered poor for a starting pitcher. Relief pitchers often have lower WHIPs than starters because they pitch fewer innings and can maintain higher intensity. Historical greats like Pedro Martinez achieved season WHIPs below 0.75.
How is WHIP calculated and what does the formula mean?
WHIP is calculated using the simple formula: WHIP equals walks plus hits divided by innings pitched. For example, if a pitcher allows 60 walks and 170 hits over 200 innings, their WHIP would be (60 plus 170) divided by 200, equaling 1.150. The formula captures the two primary ways batters reach base against a pitcher through their own doing, which are getting a hit or receiving a base on balls. Hit batsmen, errors, and fielders choices are not included in the WHIP calculation. The stat is straightforward to compute and provides an intuitive measure of how many baserunners a pitcher surrenders per inning of work.
What are the limitations of WHIP as a pitching statistic?
While WHIP is useful, it has several notable limitations. It treats all hits equally, meaning a single counts the same as a home run, even though a home run is far more damaging. It does not account for hit batters, which also put runners on base. WHIP ignores the sequencing of events, so a pitcher who scatters hits across multiple innings looks the same as one who allows them in clusters. It does not reflect the quality of defense behind the pitcher or the ballpark environment. Additionally, WHIP does not distinguish between different types of walks such as intentional walks. Modern analysts often supplement WHIP with stats like FIP and xFIP for deeper evaluation.
How does WHIP compare to ERA for evaluating pitchers?
WHIP and ERA measure different aspects of pitching performance and are most valuable when used together. ERA, or Earned Run Average, measures the number of earned runs a pitcher allows per nine innings and directly reflects scoring. WHIP measures baserunner traffic regardless of whether those runners ultimately score. A pitcher can have a low WHIP but a high ERA if the few baserunners they allow tend to score, perhaps due to poor timing or home runs. Conversely, a pitcher might have a higher WHIP but lower ERA if they consistently strand runners. WHIP is often considered a better predictor of future performance because it is less subject to luck and sequencing effects than ERA.
Why do hit batters and reached-on-errors not count toward WHIP?
WHIP is defined narrowly as walks plus hits divided by innings pitched, so hit batsmen, batters who reach on an error, catcher's interference and runners inherited from another pitcher are all excluded. Intentional walks, by contrast, are included. The practical effect is that WHIP slightly understates the true traffic a pitcher puts on the bases, and the gap is largest for pitchers who hit an unusual number of batters. If you want total traffic, compute baserunners per nine innings from a box score instead of inferring it from WHIP.
How do I convert innings pitched from baseball notation into a decimal?
Official innings pitched is written with a fractional suffix that counts outs, not tenths: 200.1 means 200 innings and one out, and 200.2 means 200 innings and two outs. Entering 200.2 literally into a calculator treats it as two tenths and inflates WHIP slightly. Convert first by dividing the outs by three, so 200.1 becomes 200.333 and 200.2 becomes 200.667. The error is tiny over a full season but can visibly distort a single-game or short-relief WHIP.
How do I turn WHIP into baserunners per nine innings?
Multiply WHIP by nine, since WHIP is already a per-inning rate. A WHIP of 1.20 corresponds to 10.8 walks and hits per nine innings, while an elite 1.00 corresponds to exactly nine. The per-nine version is often easier to reason about because it maps onto a full game: the difference between 1.00 and 1.30 sounds small until you express it as nine baserunners a game against 11.7, which is close to three extra runners for the defense to strand every start.
Why does a pitcher's WHIP swing from year to year even when their stuff has not changed?
The hits half of WHIP depends heavily on batting average on balls in play, which is largely outside a pitcher's control and drifts around a league norm near .300 from season to season. A pitcher whose BABIP runs unusually low will post a flattering WHIP that regresses the following year, and the reverse holds for one who suffered a high BABIP. Walk rate is far more stable and reflects genuine command, which is why analysts often separate walks per nine from hits per nine when judging whether a WHIP change is real.
Why do relief pitchers usually post lower WHIPs than starters?
A reliever typically faces a lineup once, can throw at maximum effort for an inning without pacing himself, and often needs only two pitches rather than a full arsenal. Starters face the times-through-the-order penalty: hitters perform measurably better the second and third time they see the same pitcher in a game. That structural advantage means a 1.10 WHIP from a one-inning reliever is not equivalent to a 1.10 WHIP from a 200-inning starter, so compare pitchers against others in the same role.
References
Reviewed for accuracy by Sher, Sports Science & Nutrition Specialist · Editorial policy
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