The similarity between a Bar Chart and a Column Chart is that both display the same data using rectangular bars. The length of these bars is proportional to the data value. Also, both are used to compare two or more values. So what is the difference? The difference lies in their orientation — and henceforth the perspective with which we humans comprehend the data. A Bar Chart is oriented horizontally and a Column Chart is oriented vertically (see our Column or Bar Chart? tutorial). This small variance can make a lot of difference depending upon how large your chart data is, or how lengthy your Category Axis Labels are.