Baseball WHIP Calculator
Calculate a pitcher's WHIP — Walks plus Hits per Inning Pitched — from season or game stats. Get a quality tier rating alongside hits per nine and walks per nine breakdowns. Works for MLB, college, and youth league stats.
What is WHIP in baseball?
WHIP stands for Walks plus Hits per Inning Pitched. It is one of the most widely used pitching statistics in baseball because it directly measures a pitcher's ability to prevent batters from reaching base — the first job of any pitcher.
Unlike ERA, which tracks what happens after runners get on base, WHIP focuses purely on how many baserunners a pitcher creates through the two most controllable events: giving up a hit or issuing a walk. A pitcher with a low WHIP is consistently getting batters out before they can become a threat.
WHIP was popularized by fantasy baseball in the 1980s and is now a standard category in most rotisserie and points leagues. It also appears on the Baseball Reference pitcher pages, FanGraphs, and MLB's Statcast platform alongside traditional stats.
WHIP formula explained
The WHIP formula is one of the simplest in baseball statistics:
WHIP = (Walks + Hits) ÷ Innings Pitched
Add all walks and hits allowed, then divide by innings pitched expressed as a decimal. The result tells you how many baserunners the pitcher allows per inning on average.
For example, a pitcher who allows 95 hits and 35 walks over 130 innings pitched has a WHIP of (95 + 35) ÷ 130 = 1.00. That is an elite figure — exactly one baserunner per inning.
Just like with ERA, innings pitched must be converted from baseball's box score notation before dividing. In a box score, 6.2 IP means six innings and two outs — not 6.2 decimal innings. Two outs equal two-thirds of an inning, so 6.2 IP becomes 6.667 decimal innings. This calculator converts automatically.
Step 1 — Convert IP to decimal
Decimal IP = whole innings + (outs ÷ 3)
Example: 7.1 IP → 7 + (1 ÷ 3) = 7.333 decimal innings
Step 2 — Compute WHIP
WHIP = (H + BB) ÷ Decimal IP
Example: (160 H + 50 BB) ÷ 185.0 IP = WHIP of 1.135 — a good, above-average season.
WHIP quality scale
WHIP thresholds are more stable across different baseball eras than ERA because they are tied to raw baserunner events rather than run scoring, which shifts more with offensive context and park factors.
| WHIP Range | Quality Tier | What it means |
|---|---|---|
| Below 1.00 | Elite | Fewer than 1 baserunner per inning; historically elite |
| 1.00 – 1.09 | Excellent | Ace-level command; Cy Young contender |
| 1.10 – 1.24 | Good | Solid rotation piece; above average |
| 1.25 – 1.39 | Average | Typical mid-rotation MLB starter |
| 1.40 – 1.59 | Below Average | Back-of-rotation; questionable durability |
| 1.60 and above | Poor | Too many baserunners; high risk of blow-up innings |
Relief pitchers are typically held to a WHIP below 1.20, since closers and setup men face batters one or two innings at a time with the advantage of fatigue not being a factor. A starter sustaining a WHIP under 1.10 over a full season is performing at an All-Star level.
H/9 and BB/9 — breaking WHIP apart
WHIP combines two very different events — hits and walks — into one number. Splitting them into separate per-nine rates reveals where a pitcher's baserunner problem actually comes from:
Hits Per Nine (H/9)
H/9 = (Hits × 9) ÷ Innings Pitched
A low H/9 means hitters are making weak contact or swinging and missing often. MLB average is typically around 8.5–9.0 H/9. Below 8.0 is excellent.
Walks Per Nine (BB/9)
BB/9 = (Walks × 9) ÷ Innings Pitched
A low BB/9 indicates good control and command. MLB average is roughly 3.0–3.5 BB/9. Below 2.5 is excellent. Above 4.5 is a control problem.
A pitcher with a 1.30 WHIP driven by a 9.5 H/9 and a 2.2 BB/9 has excellent control but is allowing too much contact — likely a stuff or pitch movement issue. A 1.30 WHIP driven by a 7.5 H/9 and a 4.2 BB/9 signals strong swing-and-miss ability but poor command — a wildness problem. The same WHIP, two very different pitcher profiles. This calculator shows both rates alongside the main WHIP result.
WHIP vs ERA — how they work together
ERA and WHIP measure different parts of pitching performance. Used together, they tell a more complete story than either stat alone.
| Profile | ERA | WHIP | What it suggests |
|---|---|---|---|
| Low ERA, Low WHIP | Good | Good | Dominant across the board — true ace |
| Low ERA, High WHIP | Good | Poor | Allowing runners but stranding them; may not hold up |
| High ERA, Low WHIP | Poor | Good | Few runners but allowing extra-base hits or homers |
| High ERA, High WHIP | Poor | Poor | Struggling on every front |
A pitcher with a 3.20 ERA but a 1.55 WHIP is likely benefiting from lucky strand rates or exceptional outfield defense. Their ERA is likely to rise as the season continues. Conversely, a 4.50 ERA with a 1.10 WHIP often signals an unlucky pitcher whose numbers should improve. WHIP acts as a leading indicator; ERA often lags behind.
Historical WHIP benchmarks
Looking at the best WHIP seasons in baseball history puts elite modern performances in perspective:
| Pitcher | Season | WHIP | IP |
|---|---|---|---|
| Pedro Martinez | 2000 | 0.737 | 217.0 |
| Guy Hecker | 1882 | 0.774 | 670.1 |
| Addie Joss | 1908 | 0.816 | 325.0 |
| Clayton Kershaw | 2014 | 0.857 | 198.1 |
| Jacob deGrom | 2018 | 0.912 | 217.0 |
Pedro Martinez's 2000 season remains the modern-era benchmark for both WHIP and ERA+. For context, the MLB league average WHIP typically sits between 1.28 and 1.38 in recent seasons. A WHIP below 1.10 puts a pitcher in the conversation for the best in the game.
Worked WHIP examples
Example 1 — Ace starter
150 hits + 40 walks over 200 innings: WHIP = 190 ÷ 200 = 0.95. H/9 = (150 × 9) ÷ 200 = 6.75. BB/9 = (40 × 9) ÷ 200 = 1.80. Elite contact suppression and elite control — a genuine Cy Young-caliber season.
Example 2 — Solid mid-rotation
170 hits + 55 walks over 175 innings: WHIP = 225 ÷ 175 = 1.29. Average but serviceable for a number-three starter. H/9 = 8.74, BB/9 = 2.83. Good control, slightly above-average contact allowed.
Example 3 — Command problems
140 hits + 75 walks over 150 innings: WHIP = 215 ÷ 150 = 1.43. Below average, with the walk rate (BB/9 = 4.50) being the main culprit. Strong enough contact suppression (H/9 = 8.40) but too wild to succeed long-term.
Example 4 — Closer
35 hits + 12 walks over 65.2 innings (65.667 decimal): WHIP = 47 ÷ 65.667 = 0.716. Elite for a high-leverage reliever. H/9 = 4.80, BB/9 = 1.64. Dominant command and contact suppression.
Baseball WHIP calculator FAQ
What does WHIP stand for in baseball?
WHIP stands for Walks plus Hits per Inning Pitched. It measures how many baserunners a pitcher allows per inning through walks and hits alone. Unlike ERA, WHIP does not factor in whether those runners actually score, making it a measure of how difficult it is for hitters to reach base against a given pitcher. A lower WHIP always means fewer baserunners allowed.
What is a good WHIP in baseball?
In modern Major League Baseball, a WHIP below 1.00 is considered elite — the pitcher is allowing fewer than one baserunner per inning. Between 1.00 and 1.10 is excellent, 1.10 to 1.25 is good, 1.25 to 1.40 is average, 1.40 to 1.60 is below average, and above 1.60 is poor. These thresholds are relatively stable across eras compared to ERA, because they are based on raw baserunners rather than run scoring, which is more sensitive to ballpark and era effects.
How do you calculate WHIP?
WHIP is calculated using the formula: WHIP = (Walks + Hits) ÷ Innings Pitched. For example, a pitcher who allows 70 hits and 30 walks over 100 innings pitched has a WHIP of (70 + 30) ÷ 100 = 1.00. Innings pitched must be converted from baseball notation to a decimal before dividing — 6.2 IP becomes 6.667 decimal innings. This calculator handles that conversion automatically.
Does WHIP include hit batters?
Standard WHIP does not include hit batters (HBP). It counts only walks (BB) and hits (H) as the numerator. Some analysts use a broader baserunners-allowed metric that adds HBP and sometimes errors, but the official WHIP statistic tracked by MLB, Baseball Reference, and FanGraphs is strictly (Walks + Hits) ÷ Innings Pitched. Intentional walks are included in the walk total by default.
What is the difference between WHIP and ERA?
ERA measures how many earned runs a pitcher allows per nine innings — it is an outcome stat tied to run scoring. WHIP measures how many baserunners a pitcher allows per inning — it is a process stat tied to on-base events. A pitcher can have a low WHIP but a high ERA if they allow hits in high-leverage situations, or a low ERA with a high WHIP if they strand runners effectively. Together, ERA and WHIP give a fuller picture of pitching performance than either stat alone.
What is the lowest single-season WHIP ever recorded?
The lowest single-season WHIP in MLB history (minimum 162 innings pitched) is 0.7373, posted by Pedro Martinez during his dominant 2000 season with the Boston Red Sox. He allowed just 128 hits and 32 walks over 217 innings. His 2000 season is widely considered one of the greatest pitching performances in baseball history by almost any statistical measure.
Does WHIP count intentional walks?
Yes, by default WHIP includes intentional walks (IBB) in the walk total. MLB's official WHIP formula uses all walks issued, both intentional and unintentional. Some advanced analyses strip intentional walks from the numerator because intentional walks are a strategic defensive choice rather than a sign of poor command, but the standard stat you will see on baseball reference sites and fantasy platforms includes intentional walks.
This tool is for educational purposes only. Always verify important results with a qualified professional.
