It's about 0.0000003 times as heavy as a Tree (Sierra Redwood)
In other words, 0.310 kilograms is 0.000000240 times the weight of a Tree (Sierra Redwood), and the weight of a Tree (Sierra Redwood) is 4,200,000 times that amount.(a.k.a. Giant Sequoia, a.k.a. Sierran redwood, a.k.a. Wellingtonia, a.k.a. "Big Tree", Sequoiadendron giganteum)
The weight of wood in a Giant Sequoia is 1,300,000 kilograms. General Sherman, a specimen in Sequoia National Park in Visalia, California, is the largest tree in the world by volume, with an estimated weight of about 1,900,000 kilograms.
It's about 5,500,000 times as heavy as a Grain of Salt
In other words, the weight of a Grain of Salt is 0.0000001890 times 0.310 kilograms.The mass of a grain of salt is approximately 0.00000005850 kilograms. Salt consumption varies widely by country; the people of the United States consume a combined total of about 2,730,000 kilograms of salt each year.
It's about 0.00000003 times as heavy as The Eiffel Tower
In other words, 0.310 kilograms is 0.00000003070 times the weight of The Eiffel Tower, and the weight of The Eiffel Tower is 32,600,000 times that amount.(a.k.a. La Tour Eiffel) (Paris, France) (total weight)
The Eiffel Tower weighs approximately 10,100,000 kilograms. Architected to be quickly assembled, the Tower contains only 930 cu. meters of solid material.
It's about 0.00000003 times as heavy as The Brooklyn Bridge
In other words, 0.310 kilograms is 0.000000023270 times the weight of The Brooklyn Bridge, and the weight of The Brooklyn Bridge is 42,970,000 times that amount.(a.k.a. New York and Brooklyn Bridge) (Manhattan and Brooklyn, New York City, New York) (total weight)
The total weight of the Brooklyn Bridge is approximately 13,320,000 kilograms. In a promotional event to prove the bridge's stability shortly after it opened, entertainer P. T. Barnum led a parade of 21 elephants across it in May of 1884.
It's about 0.00000002 times as heavy as The Statue of Liberty
In other words, 0.310 kilograms is 0.00000001260 times the weight of The Statue of Liberty, and the weight of The Statue of Liberty is 79,400,000 times that amount.(a.k.a. Liberty Enlightening the World, a.k.a. La Liberté éclairant le monde) (total weight, including foundation)
The total weight of the Statue of Liberty, including her base is roughly 24,600,000 kilograms. The statue was designed using an optical trick known as "forced perspective" to make the statue appear proportionally correct when viewed from its base and is, in actuality, disproportionately large at the top.
It's about 0.000000003 times as heavy as The CN Tower
In other words, 0.310 kilograms is 0.00000000262910 times the weight of The CN Tower, and the weight of The CN Tower is 380,360,000 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada)
The CN Tower weighs approximately 117,910,000 kilograms. The Tower is home to the world's highest glass floor — a viewing area that allows visitors to look straight down 342 m (1,120 ft) to the ground below.
It's about 0.000000002 times as heavy as The Sears Tower
In other words, 0.310 kilograms is 0.0000000015360 times the weight of The Sears Tower, and the weight of The Sears Tower is 651,000,000 times that amount.(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 201,800,000 kilograms. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.