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Online Course

Estimating Timber Volume More Efficiently

Available Now

In this training, participants will learn techniques that can shorten the total time it takes to complete a timber volume or weight inventory of a forested stand. Upon completion of this course, participants will be able to apply the principles learned in training to determine the total number of sampling point locations needed within a given forest inventory, and correctly calculate timber volume or weight estimates from a sampling-based inventory.

Course Details

Registration Fee

$20. Click the button above to register.

Once registered, a confirmation letter with a link to the course will be e-mailed to you. From that time, you have 30 days to complete the training.

Cancellation Policy

Online trainings are nonrefundable.

Course Topics

By the end of this training, participants will be able to:

  1. Define the various components and related terminology for a sampling-based inventory.
  2. Calculate the number of sampling point locations needed for a given forest inventory.
  3. Calculate the correct prism factors to use for the two types of sampling points used within a sampling-based inventory and determine the appropriate point location grid system to use.
  4. Calculate timber volume or weight estimates from a sampling-based inventory.
  5. Calculate statistical confidence intervals for timber volume or weight estimates from a sampling-based inventory.

Target Audience

This online training is designed for professional foresters. It does require a basic understanding of statistics as well as access to Microsoft Excel.

Continuing Education Credit

This course is pre-approved for:

To obtain credit, you will need to complete the training within 30 days of registering and receive 75% or higher on all assessments. A list of individuals who successfully complete the training will be submitted to WI-DNR and SAF on the first of each month.

Any questions regarding credit can be directed to the Wisconsin Forestry Center.



Paul Doruska

Professor of Forestry, UW-Stevens Point

Paul Doruska is a professor of forestry at UW-Stevens Point. He teaches undergraduate and graduate courses in forest measurements, forest biometry, forest management and finance, forest products, natural resources communication and experimental design. His research has focused on stand density index based management, weight scaling of timber, and developing equations to allow foresters to inventory timber by weight.