Tree Height Calculator
Viewpoint Level with Base of Tree

H = h + D * tan(Theta)
treehght
h Distance From Ground to Intercept of Horizontal Line (feet)
D Distance from Tree to Viewpoint
theta Angle from Viewpoint to Top
H Height of Tree(feet) =

Tree Height Calculator
Viewpoint above Base of Tree

H = D * (tan u + tan d)
treehght3
D Horizontal Distance from Viewpoint to Tree (feet)
u Angle from Viewpoint to Top of Tree
d Angle from Viewpoint to Bottom of Tree
H Height of Tree(feet) =

Tree Height Calculator
Viewpoint Below Base of Tree

H = D * (tan u - tan d)
treehght3
D Horizontal Distance from Viewpoint to Tree (feet)
u Angle from Viewpoint to Top of Tree
d Angle from Viewpoint to Base of Tree
H Height of Tree(feet) =

Leaning Tree Height Calculator
Viewpoint Above Base of Tree

H = D x (tan(u) + tan(d))
The next two calculators give the height of the tree above the ground, not the length of the tree.
leaningtreehght
D Distance from Tree to Viewpoint
u Angle from Viewpoint to Top of Tree
d Angle from Viewpoint to Base of Tree
H Height of Tree(feet) =

Leaning Tree Height Calculator
Viewpoint Below Base of Tree

H = D x (tan(u) - tan(d))
leaningtreehght
D Distance from Tree to Viewpoint
u Angle from Viewpoint to Top of Tree
d Angle from Viewpoint to Base of Tree
H Height of Tree(feet) =