Skip to content
Calcapedia
Menu
Sports

WHIP Calculator

Calculate a pitcher's walks plus hits per inning pitched, with hits, walks, strikeouts and home runs per nine innings.

Level: Grade 6

Printable worksheet

WHIP Calculator

Know the answer you need? Pick an input to work backward.

Inputs

Include intentional walks. Hit batters are not part of WHIP.

In baseball notation, 180.2 means 180⅔ innings.

Untick to enter true decimal innings such as 6.333.

Used for the per-game rates: 9 for baseball, 7 for most softball and many youth leagues.

Result

WHIP (walks + hits per inning)

1.11

200 walks and hits over 180.667 innings is a WHIP of 1.11.

Walks plus hits
200
Hits per 9 innings (H/9)
7.47
Walks per 9 innings (BB/9)
2.49
Strikeouts per 9 innings (K/9)
9.46
Strikeout-to-walk ratio (K/BB)
3.8
Home runs per 9 innings (HR/9)
1

See the step-by-step solution ↓

Step-by-step solution

  1. Convert the notation: the digit after the point counts outs, and each out is one third of an inning

    180.2 IP=180 ⅔ innings=180×3+23=180.666667

  2. WHIP counts the batters a pitcher put on base with walks and hits, per inning pitched

    WHIP=BB+HIP

  3. Add the walks and hits, then divide by the innings to get baserunners per inning

    50+150180.666667=200180.666667=1.107011

  4. Per-game rates scale a count to a 9-inning game: 9 times the count, divided by innings

    H/9=9×150180.666667=7.472325

  5. Scale walks the same way, to see how often this pitcher gives free passes

    BB/9=9×50180.666667=2.490775

  6. Scale strikeouts the same way, to see how often this pitcher gets batters out on their own

    K/9=9×190180.666667=9.464945

  7. Divide strikeouts by walks; a higher ratio means better control

    K/BB=19050=3.8

  8. Scale home runs the same way, to see how often big hits get through

    HR/9=9×20180.666667=0.99631

Test yourself

20 quick questions built from this calculator's formula: work out results, predict what happens when an input changes, and work backward from an answer. Every answer comes with the working.

What this calculator does

Work out a pitcher's WHIP and see how many batters they let on base each inning. WHIP is short for walks plus hits per inning pitched. It ignores whether those runners later score, so it isolates the part of pitching the pitcher controls most directly: keeping hitters off the bases in the first place. A lower WHIP is better.

This calculator reads innings in the box-score notation where 180.2 means 180⅔ innings, converts them to true innings, and returns WHIP. Add strikeouts and home runs to get the rest of a pitcher's rate line: hits, walks, strikeouts and home runs per nine innings, and the strikeout-to-walk ratio.

Where it's used

Why this math matters outside the classroom:

  • Pitcher scouting. A pitcher who allows 50 walks and 150 hits in 180⅔ innings has a WHIP of 200 ÷ 180.67, about 1.11.
  • Fantasy baseball. Fantasy managers in rotisserie leagues track team WHIP as one of their scoring categories each week.
  • Short relief outings. A reliever who walks one and gives up one hit in 2 innings has a WHIP of 2 ÷ 2, which is 1.00.
  • Softball pitching. A softball pitcher allowing 14 hits in 21 innings gives up 7 × 14 ÷ 21, about 4.67 hits per 7-inning game.
  • Classroom rates. Math teachers use box scores to practise unit rates, such as strikeouts per inning, with real game numbers.

Grade level and standards: Grade 6; Common Core State Standards for Mathematics 6.RP.A.3.b, 6.RP.A.2. © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

How to use it

  1. Enter walks and hits allowed.
  2. Enter innings pitched as a box score shows them, or untick the notation box to type true decimal innings.
  3. Optionally enter strikeouts and home runs allowed for K/9, HR/9 and the strikeout-to-walk ratio. Change the game length to 7 for softball.
  4. Read WHIP as the headline figure, with the per-game rates and the working below.

What the inputs mean

Walks allowed (BB)
Count every base on balls, including intentional walks. Batters hit by a pitch are left out of WHIP by definition.
Innings pitched (IP)
Each out is a third of an inning, so box scores write 6⅓ innings as 6.1 and 6⅔ as 6.2. A value such as 6.5 is not valid in that notation.
Innings use baseball notation (.1 = ⅓ inning, .2 = ⅔ inning)
Untick to enter true decimal innings such as 6.333.
Innings in a regulation game
Only the per-game rates use this. WHIP itself is always per single inning.

Formula and method

true innings = whole innings + extra outs ÷ 3
WHIP = (BB + H) ÷ IP
H/9 = 9 × H ÷ IP,  BB/9 = 9 × BB ÷ IP
K/9 = 9 × K ÷ IP,  HR/9 = 9 × HR ÷ IP
K/BB = K ÷ BB

BB is walks (bases on balls), H is hits allowed, IP is true innings pitched, K is strikeouts and HR is home runs allowed. WHIP divides the walks and hits a pitcher allowed by the innings pitched. Batters who reach on an error, a fielder's choice or a hit by pitch are not counted, because the definition only uses walks and hits.

The per-nine rates scale a count to a full regulation game, the same way ERA (earned run average) does. That lets you compare pitchers with different workloads. With a 7-inning game the multiplier becomes 7.

Worked example

A starter allows 150 hits and 50 walks in 180.2 innings, with 190 strikeouts and 20 home runs allowed.

  1. Innings: 180.2 means 180 innings and 2 outs, so (180 × 3 + 2) ÷ 3 = 542 ÷ 3 = 180.666667 innings.
  2. Walks plus hits: 50 + 150 = 200.
  3. WHIP: 200 ÷ 180.666667 = 1.107011.
  4. H/9: 9 × 150 ÷ 180.666667 = 7.472325; BB/9: 9 × 50 ÷ 180.666667 = 2.490775.
  5. K/9: 9 × 190 ÷ 180.666667 = 9.464945; K/BB: 190 ÷ 50 = 3.8; HR/9: 9 × 20 ÷ 180.666667 = 0.996310.

Result: The pitcher's WHIP is 1.11, with 7.47 H/9, 2.49 BB/9, 9.46 K/9, 1.00 HR/9 and a 3.80 strikeout-to-walk ratio.

Understanding the result

At the professional level a WHIP around 1.30 is roughly ordinary, below 1.20 is good and below 1.00 is outstanding over a full season. Youth and amateur figures run higher.

Split WHIP into its parts to see where baserunners come from. A high BB/9 points to control problems. A high H/9 with a normal walk rate may be bad luck on balls in play. BABIP (batting average on balls in play) can help check that.

Assumptions and limitations

  • All counts are whole numbers and home runs allowed do not exceed hits allowed.
  • Displayed rates are rounded to two decimals. Every rate is computed from unrounded true innings.
  • WHIP treats a walk and a home run as equal, although a home run is far more damaging. Pair it with ERA for the full picture.
  • It does not count hit batters, errors or fielder's choices, and it is not adjusted for ballpark or league.

Frequently asked questions

What is a good WHIP?

Lower is better. In professional baseball, a full-season WHIP under about 1.20 is good and under 1.00 is elite, while one above about 1.40 usually means a struggling pitcher.

Why is 6.1 innings not 6.1 innings?

The digit after the point counts outs, not tenths. 6.1 is 6 innings and 1 out, which is 6⅓ or about 6.333 true innings. Using 6.1 directly would understate the innings and overstate WHIP.

Do hit batters count in WHIP?

No. Despite putting a runner on base, a hit by pitch is not part of WHIP's definition, which uses only walks and hits.

How is WHIP different from ERA?

ERA measures earned runs allowed per nine innings, so it depends on when the runners reached and what happened next. WHIP only counts how many reached by walk or hit, which makes it steadier over short stretches.

Sources

How this calculator is checked

Method: MLB glossary definition of WHIP, (walks + hits) ÷ innings pitched; per-nine rates scale counts by game length ÷ innings, as ERA does. The calculation is covered by automated tests with known reference values and edge cases. Last updated 2026-10-18. Found a problem? Tell us.

Embed this calculator

Put this WHIP Calculator on your own website or blog for free. Paste this code where you want it to appear: