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This method is used mostly by professional tree researchers and arborists, especially to measure the height of record breaking trees. The most accurate way to measure the height of a tree involves climbing to the top of the tree and doing a direct tape drop. All height measurements on the tree record list are made using a reliable and documented method. However, if a reliable tree height measurement is required, one of the following methods needs to be used (each one having its own caveats). Here various methods of height measuring are described from the most accurate to the least accurate.Īt Monumental Trees we recommend direct tape drop or the sine method as the most accurate and reliable. However these methods can still result in large errors. Instruments called hypsometers often perform these two measurements and calculate from them the height of the tree. The latter can be measured with a clinometer. Professional foresters however have, for decades, used methods based on measuring the distance from the observer to the trunk and the angle to the top. Many people try it with simple estimation techniques like the stick method, the lumberjack method or another easy method to get a rough estimate of the height of a tree. Measuring the height of trees is more difficult than measuring diameter or girth.