To nominate a tree, you need three measurements:

  • Trunk Circumference
  • Height
  • Crown Spread

Trees of the same species are compared using the following calculation:

Trunk Circumference (inches) + Height (feet) + ¼ Average Crown Spread (feet) = Total Points

Measuring Guidelines Handbook

Champion Tree Measuring Guidelines HandbookWith the guidance of the Measuring Guidelines Working Group, American Forests has released the National Big Tree Program’s tree-measuring guidelines handbook. This comprehensive guide was assembled and published to ensure accuracy and integrity in the national register of Champion Trees.