It's about one-one-hundred-fiftieth as heavy as The Space Shuttle.
In other words, the weight of The Space Shuttle is 160 times 450,000 grams.(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 71,000,000 grams. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 20,000,000 grams.
It's about 150 times as heavy as a Brick.
In other words, the weight of a Brick is 0.0063 times 450,000 grams.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 2,900 grams. 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 200 times as heavy as a Chihuahua.
In other words, the weight of a Chihuahua is 0.005 times 450,000 grams.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 2,250 grams. 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, 450,000 grams is 0.00431 times the weight of a Blue Whale, and the weight of a Blue Whale is 232 times that amount.(Balaenoptera musculus)
Blue whales weigh between 105,000,000 grams. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 1 gram each.
It's about 350 times as heavy as a Human Brain.
In other words, 450,000 grams is 333 times the weight of a Human Brain, and the weight of a Human Brain is 0.003 times that amount.(adult)
The average weight of an adult human brain is between 1,300 and 1,400 g. 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 a House.
In other words, 450,000 grams is 0.00288 times the weight of a House, and the weight of a House is 347 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 156,000,000 grams, 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 460,000 grams.
It's about 450 times as heavy as a liter of Water.
In other words, 450,000 grams is 449.98740 times the weight of a liter of Water, and the weight of a liter of Water is 0.002222284 times that amount.(fresh; 4° C / 39.2° F; maximum density)
Contrary to popular belief, 1 liter (0.0.264172052358148 gal) of water at 4° C / 39.2° F (its point of maximum density) weighs 1,000.028 grams rather than 1 kg exactly. The total volume of water on the planet Earth is about 13,590,000,000,000,000,000 (13.59 quntillion) L (3,590,000,000,000,000,000 gallons).