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Basal Area from Girth Measured @ Breast Height

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Calculate the basal area in square feet from the girth of a tree measured at breast height.
Girth of tree is measured at 4.5 feet above the ground.

To calculate for one tree:
Basal Area in sq ft = (girth ÷ 3.14159)² * 0.00545415391

example:

circumference of tree measured @ breast height = 64 inches
64 ÷ 3.14159 = 20.37
20.37 * 20.37 = 415.01 * 0.00545415391 = 2.26354 sq feet of basal area

Basal Area from Tree Girth Measured @ BH

Girth in
Average Bark Thickness in
Decimal Rounding (# of digits in result) #

Results:

Diameter in
Area in Square Feet ft²

Calculation

  1. tree girth measured @ breast height in inches
  2. average thickness of bark in inch
  3. decimal rounding preset @ 5

Result

  1. diameter of tree in inches
  2. basal area of tree in square feet (if no value is used for bark thickness, basal area and diameter of tree includes the bark)


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