Walks plus Hits per Inning Pitched – measures baserunners allowed
WHIP = (Hits + Walks) ÷ Innings Pitched. Lower is better. Typical range: 0.90–1.50.
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WHIP (Walks plus Hits per Inning Pitched) is a baseball pitching statistic that measures how many baserunners a pitcher allows per inning. Unlike ERA, which focuses on earned runs, WHIP evaluates a pitcher’s ability to keep batters off the bases entirely. This free WHIP Calculator helps coaches, fantasy baseball managers, players, and fans compute WHIP instantly. Simply enter hits allowed, walks issued, and innings pitched. The tool applies the standard formula to show your WHIP, total baserunners, innings pitched, and a performance level rating from “Exceptional – Cy Young Caliber” to “Below Average – Needs Improvement.” Toolraxy built this calculator to make pitcher evaluation accessible for everyone.
Enter the pitcher’s total Hits Allowed (H) – all hits surrendered regardless of base achieved.
Enter the number of Walks (BB) – also called bases on balls issued.
Enter Innings Pitched (IP) – decimal format supported (e.g., 120.1 for 120 and 1/3 innings).
Click the Calculate button, or simply tab between fields—the tool updates automatically.
View your WHIP, total baserunners (H + BB), innings pitched, and performance rating below.
Use the Reset button to restore the default sample stats.
This calculator uses the official WHIP formula as defined by Major League Baseball. The logic is pulled directly from the JavaScript in the tool. No additional assumptions or hidden multipliers are applied.
Formula:WHIP = (Hits Allowed + Walks Issued) ÷ Innings Pitched
Calculation Logic:
First, the tool calculates Total Baserunners by summing Hits Allowed and Walks Issued.
If Innings Pitched is 0 or less, the tool displays an error message asking for valid innings.
If Innings Pitched is greater than 0, it divides Total Baserunners by Innings Pitched.
The result is rounded to two decimal places (e.g., 1.25).
Finally, the tool assigns a performance rating based on the WHIP value.
Validation & Edge Cases:
Invalid Input: If any field is left blank, the tool defaults to 0 for that statistic.
Zero Innings Pitched: If IP = 0, the calculator shows “Enter innings pitched” and stops calculation.
Perfect WHIP: If a pitcher allows 0 hits and 0 walks over any number of innings, WHIP = 0.000.
Decimal Innings: The tool accepts decimal values (e.g., 120.1 for 120⅓ innings) and displays with one decimal place.
Performance Rating Scale:
| WHIP Range | Rating |
|---|---|
| < 1.00 | Exceptional – Cy Young Caliber |
| 1.00 – 1.14 | Excellent – All‑Star Level |
| 1.15 – 1.29 | Great – Above Average |
| 1.30 – 1.39 | Good – Reliable Starter |
| 1.40 – 1.49 | Average – Serviceable |
| ≥ 1.50 | Below Average – Needs Improvement |
Imagine a Major League Baseball starting pitcher finishing a season with these stats: 120 hits allowed, 40 walks issued, and 120 innings pitched.
To calculate his WHIP, follow these steps:
Start with the formula: WHIP = (Hits + Walks) ÷ Innings Pitched
Insert the numbers: (120 + 40) ÷ 120
Sum the numerator (Total Baserunners): 120 + 40 = 160
Divide by Innings Pitched: 160 ÷ 120 = 1.33333...
Round to two decimal places: 1.33
Result: The pitcher’s WHIP is 1.33, which falls into the “Good – Reliable Starter” rating. This means he allows approximately 1.33 baserunners per inning pitched. A WHIP of 1.33 is slightly above the MLB average of about 1.30, indicating a solid but not elite season. Over a full 120-inning season, this pitcher allowed 160 baserunners.
Saves time: Instant calculation eliminates manual math and decimal inning conversions.
Reduces manual errors: Automatically validates inputs and applies the correct formula.
Instant results: WHIP updates as you type—no page reloads needed.
Free: No payment, subscription, or sign-up required.
Private: All calculations happen in your browser (client-side). No data is sent to any server.
Accessible on any device: The responsive design works on phones, tablets, and desktop computers.
User-focused: Includes a copy button, share feature, and clear performance rating scale.
How accurate is this WHIP calculator?
It is mathematically perfect for standard baseball scoring. It uses the official MLB formula: (Hits + Walks) ÷ Innings Pitched. The result is rounded to two decimal places, which is the industry standard for reporting WHIP.
What is the difference between WHIP and ERA?
WHIP measures baserunners allowed per inning (hits + walks ÷ IP). ERA measures earned runs allowed per 9 innings. WHIP isolates control and hit prevention; ERA includes the impact of those baserunners scoring. A pitcher can have a good WHIP but bad ERA if they allow hits in clusters.
Does hit-by-pitch count in WHIP?
No. In official MLB WHIP calculations, hit-by-pitch (HBP) is NOT included. WHIP only counts hits and walks. This calculator follows that rule. Some advanced metrics use “WHIP + HBP” but that is not standard.
What is a perfect WHIP?
A perfect WHIP is 0.000, achieved when a pitcher allows zero hits and zero walks over any number of innings. This is extremely rare—even no-hitters often include walks. A perfect game (no hits, no walks, no baserunners) produces a 0.000 WHIP.
Can I calculate WHIP for a relief pitcher?
Yes. The formula works for any pitcher, any role. Enter the reliever’s hits allowed, walks issued, and innings pitched (e.g., 65.2 innings = 65.667). Relief pitchers typically have lower WHIP than starters.
Is this tool safe to use?
Yes, completely. The tool runs entirely on your device using JavaScript. No personal information is collected, no cookies are stored, and no data is sent over the internet. The share and copy features only access your clipboard.
How do I reset the calculator to default values?
Click the green “Reset” button. This restores the sample stats: 120 hits, 40 walks, 120 innings pitched—typical for a league-average starting pitcher.
Can I calculate WHIP for a single game?
Yes. Enter the pitcher’s hits and walks allowed in that specific game, and the innings pitched (e.g., 6.0 for 6 innings, 5.1 for 5⅓ innings). The formula works for any sample size.
What if my pitcher has allowed partial innings?
Enter the decimal equivalent. For 5⅓ innings, enter 5.333 (since ⅓ = 0.333). For 5⅔ innings, enter 5.667. For 5.0 innings, enter 5. The tool handles decimals correctly.
What is the relationship between WHIP and fantasy baseball?
WHIP is a standard category in many fantasy baseball leagues (5×5 rotisserie leagues include WHIP alongside ERA, wins, strikeouts, and saves). A low WHIP helps win this category. Relief pitchers often provide elite WHIP in fewer innings.
What is the best WHIP in a single MLB season?
The modern MLB record for lowest WHIP in a qualified season is 0.78 by Pedro Martínez in 2000 (128 hits, 32 walks, 217 IP). For a single game, many pitchers have achieved 0.00 WHIP with perfect games or one-hitters with no walks.
Does WHIP account for inherited runners?
No. WHIP does not distinguish between a pitcher’s own baserunners and inherited runners. Saves and holds statistics track that separately. WHIP only measures runners a pitcher personally allows via hits or walks.
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