It's about 6,000 times as heavy as a Cat.
In other words, the weight of a Cat is 0.0002 times 31.530 tons.(Felis catus) (Domestic; healthy weight)
The average domestic cat should weigh between 0.005 tons. Cats are known for their righting reflex, which allows them to land on their feet and survive falls from heights of 1 m (3 ft) up to about 21 m.
It's about one-seven-thousandth as heavy as The Sears Tower.
In other words, 31.530 tons is 0.0001417 times the weight of The Sears Tower, and the weight of The Sears Tower is 7,057 times that amount.(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 222,400 tons. 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.
It's about 10,000 times as heavy as a Brick.
In other words, 31.530 tons is 9,900 times the weight of a Brick, and the weight of a Brick is 0.0001 times that amount.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 0.0032 tons. The steeple of the Church of St. Martin in Landshut, Germany is said to be the tallest brick tower in the world at a height of 130.6 m (428.5 ft) and was constructed using an estimated 650,000 bricks.
It's about one-ten-thousandth as heavy as The Empire State Building.
In other words, 31.530 tons is 0.00008640 times the weight of The Empire State Building, and the weight of The Empire State Building is 11,600 times that amount.(New York City, New York)
The Empire State Building weighs approximately 365,000 tons. About 4% of the building's weight is its 6,000 cu. m (200,000 cu. ft) of limestone façade.
It's about 15,000 times as heavy as a Chihuahua.
In other words, 31.530 tons is 12,700 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.00007870 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 0.00248 tons. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about 20,000 times as heavy as a Human Brain.
In other words, 31.530 tons is 21,200 times the weight of a Human Brain, and the weight of a Human Brain is 0.00004720 times that amount.(adult)
The average weight of an adult human brain is between 0.00149 tons. In humans and primates, sight and vision utilize about 30 different parts of the brain which together account for about half of the brain's size.
It's about one-thirty-thousandth as heavy as The Golden Gate Bridge.
In other words, 31.530 tons is 0.00003550 times the weight of The Golden Gate Bridge, and the weight of The Golden Gate Bridge is 28,200 times that amount.(San Francisco, California and Marin County, California) (Post 1986 weight reduction; total weight of bridge, anchorage, and approaches)
Following the completion of the 1986 project to eliminate excess material, the total weight of the Golden Gate Bridge — including its anchorages and approaches — is 887,000 tons. The two main cables in the spanning the bridge are spun out of a total of 129,000 km (80,200 mi) of wire.