# Basal Area from Girth Measured @ Breast Height in Centimetres

Calculate the basal area in square metres from the girth of a tree measured at breast height.

*To calculate for one tree:*

**Girth of tree is measured at 1.3 metres above the ground.**Basal area in sq m = (girth ÷ 3.14159)² * 0.00007853975

#### example:

circumference of tree measured @ breast height = 76 centimetres 76 ÷ 3.14159 = 24.19 24.19 * 24.19 = 585.2321453666172 * 0.00007853975 = 0.04596 sq metres of basal area

### Basal Area from Tree Girth Measured @ BH

#### Calculation

- tree girth measured @ breast height in centimetres
- average thickness of bark in centimetres
- decimal rounding preset @ 5

#### Result

- diameter of tree in centimetres
- basal area of tree in square metres
*(if no value is used for bark thickness, basal area and diameter of tree includes the bark)*

##### Logging Calculators

#### Stems, Girth, Diameter and Basal Area Calculators

- Area of a Circle from Diameter in Metres
- Area of a Circle from Foot and Inch Diameter
- Basal Area from Diameter in Centimetres
- Basal Area from Diameter in Inches
- Basal Area from Girth Measured @ Breast Height in Centimetres
- Basal Area from Girth Measured @ Breast Height in Inches
- Circumference (Girth) of a Log from Diameter, Foot and Inch
- Convert Diameter in Centimetres to Girth in Inches
- Circumference (Girth) of a Log from Diameter, Inch and Fraction

- Diameter of Tree from Circumference Measurement
- Diameter/Centimetres to Inches/Quarter Girth
- Fixed Area Plot, Acres
- Fixed Area Plots, Hectares
- Square Feet (Quarter Girth) to Square Centimetres
- Square Feet (Quarter Girth) to Square Metres
- Trees per Hectare to Trees per Acre
- Trees per Acre to Trees per Hectare