Tree Height Calculator
Free Tree height Calculator for trees & forestry. Enter variables to compute results with formulas and detailed steps.
Formula
Height = Distance x tan(angle) + Eye Height
Tree height is calculated using trigonometry. The height above your eye level equals the horizontal distance to the tree multiplied by the tangent of the angle to the treetop. Add your eye height to get the full tree height on level ground.
Frequently Asked Questions
How do you measure tree height with a clinometer?
Stand at a known distance from the tree (typically 50-100 feet). Use a clinometer or inclinometer to measure the angle from your eye to the top of the tree, and optionally the angle down to the base. The height above your eye level equals the distance multiplied by the tangent of the upward angle. Add your eye height if on level ground, or add the distance times tangent of the downward angle if the base is below you. This trigonometric method is the standard used by professional foresters.
What is the shadow method for measuring tree height?
The shadow method uses similar triangles formed by the sun. Place a stick of known height vertically in the ground and measure its shadow. Then measure the tree shadow. Since the sun angle is the same for both, tree height divided by tree shadow equals stick height divided by stick shadow. This method works best on flat ground with clear shadows at midday. It does not work on cloudy days or when the tree crown shadow is indistinct, but it requires no special equipment.
How accurate are field tree height measurements?
Clinometer-based measurements are typically accurate within 5-10% for trees under 100 feet. Error increases with tree height because small angle measurement errors are amplified. Common sources of error include incorrect distance measurement, not sighting the true top of the tree, and sloped ground. Using a rangefinder for distance and taking measurements from multiple positions improves accuracy. Professional hypsometers like the Nikon Forestry Pro can achieve accuracy within 1-2 feet.
What is the tallest tree species?
Coast redwood (Sequoia sempervirens) is the tallest tree species, with the tallest known individual, Hyperion, measuring 380.3 feet (115.92 meters) in Redwood National Park, California. Other exceptionally tall species include mountain ash (Eucalyptus regnans) in Australia at up to 330 feet, Douglas-fir at up to 327 feet, and Sitka spruce at up to 317 feet. These trees achieve extreme heights in coastal environments with abundant moisture and mild temperatures.
Can I use Tree Height Calculator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.