Specific gravity is the ratio of the density of wood to the density of water. A wood doesn't float, for example, if it's specific gravity is 1.00 or greater. We display the specific gravity for each of our woods using it's kiln-dried measurement when it's available. The trouble with this number is that the specific gravity of a wood changes with its moisture content. So use this number just as a ballpark guide to estimate how dense a wood is. We've also compared the number to that of red oak, as red oak is the most commonly used hardwood in North America. Hopefully that comparison will give you a close idea of how dense a particular wood is.
We're here to help you be successful with your woodworking, and we want you to be pleased with your order! Always call or email when you have questions. We're happy to help.