So I’ve put together a nifty little wOBA calculator that does just that. It’ll likely spit out slightly different results than the ones you’ll find on FanGraphs or StatCorner, and that’s because it works a bit differently than they do.
First and foremost, I’m allowing you to set the league rate to whatever you would like it to be. One of the criticisms I’ve heard of wOBA is that the rate it’s scaled to (OBP) isn’t as intuitive as, say, batting average.
And this is true. So if you feel inclined, plug in your desired league rate—say .260—and you’ve got yourself a weighted batting average...