How do you calculate WHIP in baseball and what does it indicate about a pitcher's performance?

WHIP in Baseball is calculated by adding a pitcher's walks and hits allowed, then dividing that total by the number of innings pitched. It stands for "Walks plus Hits per Inning Pitched." A lower WHIP indicates that a pitcher is more effective at preventing baserunners, as it measures how many runners a pitcher allows on base per inning pitched.