WHIP Baseball Calculator
Walks plus hits per inning pitched.
What it does
WHIP counts baserunners a pitcher allows per inning, stripping defense and sequencing luck out of ERA arguments. Walks plus hits over innings pitched is the whole stat, readable in one number.
The tool above takes hits, walks, and innings with partial inning outs. It returns WHIP with runners and true innings beside it.
The defaults (120 hits, 45 walks, 150 innings) give 165 runners for a 1.100 WHIP. Tony Mullane's SABR line (4195 hits, 1408 walks, 4531 innings) checks at 1.237 exactly as published.
The formula follows the MLB glossary with SABR research matching: walks plus hits divided by innings, excluding hit batters, errors, and fielder choices.
How to use
- Enter hits allowed.
- Enter walks allowed, intentional included.
- Enter full innings pitched.
- Pick outs in the partial inning.
- Read WHIP to three decimals.
- Compare within role and era.
Formula
- H
- Hits allowed, all kinds.
- BB
- Bases on balls including intentional.
- IP
- Full innings plus outs over 3.
Scorebook 6.1 means 6 and one third, never 6.10 decimal; the tool converts outs properly. Relievers, starters, and eras compare only loosely since usage shapes baserunners.
Worked example
Example: 120 hits, 45 walks, 150 IP
Defaults: 120 hits, 45 walks, 150 full innings, 0 outs.
- Runners: 120 + 45 = 165.
- Innings: 150 + 0/3 = 150.
- WHIP: 165 / 150 = 1.100.
- Tool shows 1.100 with 165 runners.
- SABR check 4195 + 1408 over 4531: 1.237.
- Partial 6.1 means 6.333, never 6.10.
Reference table
| Line | Runners / IP | WHIP |
|---|---|---|
| 120 H, 45 BB, 150 | 165 / 150 | 1.100 |
| 150 H, 60 BB, 200 | 210 / 200 | 1.050 |
| Mullane (SABR) | 5603 / 4531 | 1.237 |
Limits
- Context free across eras and parks.
- Defense independent, not luck proof.
- Small samples mislead.
- Role shapes baserunners allowed.
Common mistakes
- Reading 6.1 as decimal 6.10.
- Adding hit batters in.
- Counting errors as hits or walks.
- Comparing closers with starters raw.
- Ignoring intentional walks out.
Try it yourself
Quick checks. Answers sit tucked under each question.
150 hits, 60 walks, 200 IP?
210 runners for a 1.050 WHIP.
Mullane SABR line?
5603 over 4531 gives 1.237.
6.1 innings meaning?
6 and one third, or 6.333 innings.
Questions
What is WHIP?
Walks plus hits per inning pitched; lower is better.
Good WHIP number?
Near 1.10 stars; 1.30 drifts toward trouble.
Hit batters included?
No, nor errors or fielder choices.
Intentional walks?
Yes, all bases on balls count.
WHIP vs ERA?
WHIP isolates baserunners; ERA adds sequencing and defense.
Partial innings?
Each out is one third; 6.1 is 6.333 innings.