Janka Rating Scale

Complete listing of janka ratings for exotic and domestic hardwoods.

decking sale
decking sale shorts

janka test

The Janka Hardness Test

is a measure of the hardness of wood. The Janka Test was developed as a variation of the Brinell hardness test. The test measures the force required to push a steel ball with a diameter of 11.28 millimeters (0.444 inches) into the wood to a depth of half the ball’s diameter. The diameter was chosen to produce a circle with an area of 100 square millimeters. The Janka hardness values have been indicated below for your reference.

Janka Hardness is measured in the following units: In USA the Force unit is pounds-force (pounds-force is shown below), Sweden:kilograms-force, Australia:newtons.


SPECIE NAME (on the left) JANKA VALUE (on the right)
janka scale
As seen on/in
PROUD members of
Email Us Watch Videos Deckbusters Like Us Get Great Ideas Join Us Follow Us #deckpics Get Inspired Link with Us