What is the average weight of a tree?

The oven-dried weight of 8.66 tons (7.86 tonnes) is the mass -- which varies by species -- of a 78.41-foot- (23.9-meter-) tall, 15.5-ton (14.38-tonne), 222-year-old oak tree in the OneOak project through the Sylva Foundation. That represents a 58.39-foot- (17.8-meter-) diameter crown oven-dried weight of 4.88 tons (4.43 tonnes) and a 35.35-inch- (89.8-centimeter-) tall main trunk oven-dried weight of 3.78 tons (3.43 tonnes). The mass of oak wood tends toward 1,300.73 to 2,050.3 pounds per cubic foot (590 to 930 kilograms per cubic meter).