# On Base Percentage Calculator

###### Updated: Oct 21, 2018

Use OBP Calculator to calculate the On Base Percentage statistic for a baseball batter

On Base Percentage:
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Background Information

In baseball statistics, on base percentage or OBP is a measure of how often a batter reaches base for any reason other than a fielding error, fielder's choice, dropped/uncaught third strike, fielder's obstruction, or catcher's interference. It is sometimes referred to as on-base average, as the statistic is rarely presented as a true percentage.