About Janka Rating

22 Oct About Janka Rating

How it Works

The Janka rating scale was created to rank the various degrees of hardness throughout the different species of hardwoods. To find this number, a steel ball is pushed halfway into a 2” x 2” x 6” wood plank. The number of pounds per square inch (PSI) needed to push the steel ball into the wood determines the Janka rating.

To keep the rating consistent, testers take the wood grain into consideration. Vertical grains are tested, but not often used in the Janka rating because they handle differently.

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