WHIP is walks plus hits divided by innings pitched. A pitcher who allows 32 walks and 128 hits in 217 innings has a WHIP of 160 ÷ 217 = 0.737. Enter innings in box-score notation: 6.1 is six innings and one out (6.333), and 6.2 is six and two outs (6.667).
WHIP counts how many batters reach base per inning through the two routes a pitcher controls most directly: walks and hits. Fantasy managers, scouts, coaches and stat-minded fans use it to compare pitchers across different workloads. Enter walks, hits and innings exactly as a box score prints them; the calculator converts the .1 and .2 partial innings into thirds, shows the outs recorded, the baserunners per nine innings, and places the result on a scale from elite (under 1.00) to poor (1.50 and up). One limit: standard WHIP ignores hit batters, errors and fielder's choices, so a pitcher who plunks many hitters looks better here than his on-base allowed would suggest.
Type the walks allowed (BB) from the pitcher's line.
Type the hits allowed (H), including home runs.
Use box-score notation such as 95.2; only .0, .1 and .2 are valid decimals.
WHIP, the outs behind it and the rating band appear on the scale chart as you type.
Result WHIP: 0.737
Baserunners allowed (BB + H): 160
Innings as a decimal: 217
Outs recorded: 651
Baserunners per 9 innings: 6.64
Rough rating: Elite
128 hits and 32 walks over 217 innings gives the lowest single-season WHIP in modern MLB history.
Result WHIP: 1.107
Baserunners allowed (BB + H): 200
Innings as a decimal: 180.667
Outs recorded: 542
Baserunners per 9 innings: 9.96
Rough rating: Very good
180.2 means 180 innings plus two outs, or 180.667 innings, not 180.2.
Result WHIP: 1.957
Baserunners allowed (BB + H): 30
Innings as a decimal: 15.333
Outs recorded: 46
Baserunners per 9 innings: 17.61
Rough rating: Poor
30 baserunners over 46 outs; the small sample triggers a caution note.
WHIP = (BB + H) ÷ IP, where IP = whole innings + outs ÷ 3
BBHIPBox scores write innings in a shorthand where the digit after the point counts outs, not tenths. The calculator turns 180.2 into 542 outs, divides by three to get 180.667 innings, then divides walks plus hits by that figure. Dividing 180.2 directly would understate innings and inflate WHIP slightly. Baserunners per nine innings is WHIP multiplied by nine, which some analysts prefer because it reads on the same scale as ERA.
League-average WHIP has sat roughly between 1.25 and 1.35 in recent seasons. Below 1.10 is very good for a starter, and under 1.00 over a full season is rare and usually belongs to a Cy Young contender.
Each inning has three outs, so box scores write one out as .1 and two outs as .2. Six innings and one out is 6 + 1/3 = 6.333 innings. The calculator converts this before dividing, and rejects decimals like .5 that cannot occur.
Yes. Official WHIP uses total walks, which includes intentional walks. Some analysts remove them to focus on the pitcher's own control, but published figures from MLB and Baseball-Reference keep them in.
No. Only walks and hits enter the numerator. A batter reaching on an error, a hit-by-pitch or a fielder's choice does not count, which is why WHIP is not a complete measure of baserunners allowed.
Pedro Martinez's 0.737 in 2000 is the modern single-season record, built on 128 hits and 32 walks over 217 innings. Over a career, Addie Joss holds the lowest mark at about 0.968, from the dead-ball era.
The two are correlated because fewer baserunners usually means fewer runs, but they can diverge. A pitcher who strands runners well or gives up few home runs may post a low ERA with an ordinary WHIP, and the reverse also happens.
Using this tool in an assignment, article or report? Copy a citation, or a link for your website.
Tools Directory Editorial Team. (2026, October 15). WHIP Calculator. Tools Directory. Retrieved October 26, 2026, from https://tools.milunir.com/sports/sports-performance/whip-calculator/
Tools Directory Editorial Team. “WHIP Calculator.” Tools Directory, 15 Oct. 2026, https://tools.milunir.com/sports/sports-performance/whip-calculator/. Accessed 26 Oct. 2026.
Tools Directory Editorial Team. “WHIP Calculator.” Tools Directory. Last modified October 15, 2026. Accessed October 26, 2026. https://tools.milunir.com/sports/sports-performance/whip-calculator/.
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