Visit Batt Mart, they do not have a chart, but they do have a feature to compare different battings. And, if you click on the ( Hobbs bonded fibers) link & start scrolling down you will see they tell you { 4.5 oz = .5" loft, 6.75 oz = .75" loft, ) they actually have pretty much all of the oz. Comparisons listed with the loft for you