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How heavy is 420 kilograms?

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It's about 150 times as heavy as a Brick
In other words, 420 kilograms is 140 times the weight of a Brick, and the weight of a Brick is 0.007 times that amount.
(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 2.9 kg. 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-one-hundred-fiftieth as heavy as The Space Shuttle
In other words, 420 kilograms is 0.006 times the weight of The Space Shuttle, and the weight of The Space Shuttle is 170 times that amount.
(for Endeavour, a.k.a. OV-105, a.k.a. Orbiter Vehicle-105) (empty weight, excluding main engines)
When empty, the space shuttle Endeavour weighs 71,000 kilograms. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 19,737 kg.
It's about 200 times as heavy as a Chihuahua
In other words, 420 kilograms is 187 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.0054 times that amount.
(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 1.5 to 3 kg. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about one-two-hundred-fiftieth as heavy as a Blue Whale
In other words, 420 kilograms is 0.0040 times the weight of a Blue Whale, and the weight of a Blue Whale is 249 times that amount.
(Balaenoptera musculus)
Blue whales weigh between 73,000 and 136,000 kg. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 0.001 kilograms each.
It's about 300 times as heavy as a Human Brain
In other words, 420 kilograms is 311 times the weight of a Human Brain, and the weight of a Human Brain is 0.0032 times that amount.
(adult)
The average weight of an adult human brain is between 1.350 kilograms. 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-three-hundred-fiftieth as heavy as The Statue of Liberty (without base)
In other words, 420 kilograms is 0.00 times the weight of The Statue of Liberty (without base), and the weight of The Statue of Liberty (without base) is 330 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 — the Statue's copper and framework only, excluding the base — is roughly 140,000 kg. 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 one-three-hundred-fiftieth as heavy as a House
In other words, 420 kilograms is 0.0027 times the weight of a House, and the weight of a House is 372 times that amount.
(149 sq. m, single-level, unfurnished)
A 149 sq. m (1,600 sq. ft), single-story, unfurnished house (without extensive masonry) of the type commonly found in America would weigh approximately 156,000 kg, based on the weight of the included materials. In contrast, a yurt — a type of dwelling structure popular among nomadic peoples of East Asia — typically weighs less than 458 kg.