How to Create Stacked Bar Chart using d3.js - A Developer Diary d3.max(dataStackLayout[dataStackLayout.length - 1], function(d) { return d.y0 + d.y; }) Now its time to draw the chart. We will focus on the 4 attributes, x, y, height & width. The x and width is straight forward. The y would be summation of d.y0 & d.y, since we should start drawing from top.