If you’re having trouble with the math, find a tree height calculator online such as this one.
Using the example above, if your shadow is 8 feet (2.4 meters) long, divide your answer by that number.
Divide the answer by the length of your shadow.
If you are 5 feet (1.5 meters) tall, and the tree’s shadow is 100 feet (30.48 meters) long, multiple them together: 5 x 100 = 500 (or for the meter measurements, 1.5 x 30.48 = 45.72).
Multiply the length of the tree’s shadow by your height.
We can use this equation to find out the tree’s height: In other words, (your shadow’s length) divided by (your height) will always equal (the tree’s shadow’s length) divided by (the tree’s height). Shadow lengths are proportional to the height of the object. plenty of times without shoes, at night, with my hair flattened down height. Calculate the tree’s height using the numbers you wrote down. You should now have three numbers written down: your height, your shadow’s length, and the length of the tree’s shadow (including 1/2 its trunk width). This body measuring tape goes up to 80 inches, and measure different parts.