Tree Diameter & Circumference Calculator

Convert tree girth to diameter or calculate DBH instantly.

Enter the tree's circumference (girth) or diameter, select the measurement unit, and get the tree's diameter. Supports batch input for multiple trees.

Examples

See how to use the Tree Diameter & Circumference Calculator with real-world data.

Single Circumference (cm)

Circumference (Girth)

Calculate diameter from a single circumference value in centimeters.

Measurement Type: Circumference (Girth)

Value(s): 62.8

Unit: Centimeter (cm)

Output Unit: Centimeter (cm)

Multiple Circumferences (cm)

Circumference (Girth)

Calculate average diameter from multiple circumference values in centimeters.

Measurement Type: Circumference (Girth)

Value(s): 31.4, 62.8, 94.2

Unit: Centimeter (cm)

Output Unit: Centimeter (cm)

Direct Diameter (inch)

Diameter

Enter a direct diameter value in inches and convert to centimeters.

Measurement Type: Diameter

Value(s): 12

Unit: Inch (in)

Output Unit: Centimeter (cm)

Circumference (m) to Diameter (mm)

Circumference (Girth)

Convert a circumference in meters to diameter in millimeters.

Measurement Type: Circumference (Girth)

Value(s): 0.785

Unit: Meter (m)

Output Unit: Millimeter (mm)

Other Titles
Understanding Tree Diameter & Circumference Calculator: A Comprehensive Guide
Learn how to accurately measure and calculate tree diameter and DBH for forestry, research, and more.

What is Tree Diameter & Circumference?

  • Definition of Tree Diameter
  • Understanding Circumference (Girth)
  • Why DBH Matters
Tree diameter is a key measurement in forestry and ecology, representing the width of a tree trunk. Circumference, or girth, is the distance around the trunk. Diameter at Breast Height (DBH) is the standard measurement taken at 1.3 meters (4.5 feet) above ground.
Tree Diameter vs. Circumference

Key Examples

  • A tree with a circumference of 62.8 cm has a diameter of 20 cm.
  • DBH is used for forest inventory and growth studies.

Step-by-Step Guide to Using the Calculator

  • Selecting Measurement Type
  • Entering Values and Units
  • Interpreting Results
Choose whether you are entering circumference or diameter. Input your value(s) and select the correct unit. The calculator will convert and display the diameter in your chosen output unit.
How to Use the Tool

Usage Examples

  • Input: Circumference = 31.4 cm, Output: Diameter = 10 cm.
  • Batch input: 31.4, 62.8, 94.2 cm gives average diameter.

Real-World Applications of Tree Diameter Measurement

  • Forestry and Timber Industry
  • Ecological Research
  • Urban Tree Management
Tree diameter is essential for estimating tree age, health, and timber volume. It is widely used in forest management, ecological studies, and urban planning.
Applications in Practice

Application Examples

  • Foresters use DBH to estimate forest biomass.
  • Urban planners assess tree health using diameter measurements.

Common Misconceptions and Correct Methods

  • Measuring at the Wrong Height
  • Confusing Units
  • Batch Input Errors
Always measure circumference at breast height (1.3 m). Ensure units are consistent. For batch input, separate values with commas and use the same unit for all.
Avoiding Mistakes

Mistake Examples

  • Measuring at ground level gives inaccurate DBH.
  • Mixing cm and inch in batch input leads to errors.

Mathematical Derivation and Examples

  • Formula for Diameter from Circumference
  • Unit Conversions
  • Batch Calculations
The diameter is calculated as circumference divided by π (pi). The calculator automatically handles unit conversions and batch calculations for multiple trees.
Calculation Formula

Formula Examples

  • Diameter = Circumference / π
  • Convert 0.785 m circumference to mm: 0.785 / π * 1000 = 250 mm.