🌲 Tree Height Calculator
Combine horizontal distance, angle to the top, and observer eye height to approximate tree height in the field.
Measure along level ground from tree base to observation point.
Use a clinometer or phone app to record the angle.
How to Use This Calculator
Measure horizontal distance
Pace or tape the distance on level ground from trunk to observation point.
Record angle to the top
Use a clinometer, transit, or smartphone inclinometer to measure the angle of elevation.
Add eye height
Include the height of your eyes above ground to account for viewing position.
Formula
Height = tan(θ) × Distance + Eye Height
θ is the angle of elevation to the tree top. Adjust for downhill or uphill positions by subtracting or adding observer height accordingly.
Full Description
Height estimates support timber valuation, hazard assessments, and arborist reports. This clinometer method is quick and reliable when the tree top is visible and terrain is relatively level.
For enhanced accuracy, take measurements from multiple sides of the tree and average the results.
Frequently Asked Questions
What if the ground slopes?
Add or subtract the difference between observer and base elevations to the final height.
Can I measure angle below horizontal?
Yes. Use negative angles for tops below eye level (e.g., measuring depressions).
Is a laser rangefinder better?
Laser hypsometers combine distance and angle automatically; this method is a manual alternative.
How accurate is this method?
Expect ±5% with careful measurements. Large errors arise from misidentified treetops or uneven ground.