Enter the length, width, and thickness of the OSB into the calculator to determine the total weight.

OSB Weight Formula

The following formula is used to calculate the weight of OSB (oriented strand board).

OSBW = L*W*T * D

  • Where OSBW is the weight of the oreinted strand board (lbs)
  • L is the length of the board (in)
  • W is the width of the board (in)
  • T is the thickness of the baord (in)
  • D is the density of the board (lbs/in^3)
    • The average density of OSB is .0231 lbs/in^3

To calculate the OSB weight, multiply the length, width, and thickness of the board to get the volume, then multiply the volume by the density.

What is OSB?


OSB, short for oriented strand board, is a type of particle that is used in construction, similar to plywood. It is created by pressure layers of wood strands together along with an adhesive.

The most common application of OSB is for applications where it needs to load-bearing, such as light steel frame houses.

How to calculate OSB weight?

Example Problem:

The following example outlines how to calculate the weight of OSB.

First, determine the length. In this example, the length is 30 inches.

Next, determine the width. The width is measured to be 20 inches.

Next, determine the thickness. This is measured to be .500 inches.

Finally, calculate the OSB weight using the formula above:

OSBW = L*W*T * D

OSBW = 30*20*.5 * .0231

OSBW = 6.93 lbs