It's about one-fifth as heavy as The Tongue of a Blue Whale.
In other words, 450,000 grams is 0.170 times the weight of The Tongue of a Blue Whale, and the weight of The Tongue of a Blue Whale is 5.90 times that amount.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 2,700,000 grams. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about six times as heavy as a Beer Keg.
In other words, 450,000 grams is 6.1810 times the weight of a Beer Keg, and the weight of a Beer Keg is 0.16180 times that amount.(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 72,800 grams when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about one-tenth as heavy as a Hippopotamus.
In other words, 450,000 grams is 0.120 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 8.330 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 3,750,000 grams. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about nine times as heavy as an Octopus.
In other words, the weight of an Octopus is 0.110 times 450,000 grams.(for Giant Pacific Octopus, Enteroctopus) (Adult, average)
The adult North Pacific Giant Octopus usually weighs around 50,000 grams. It is the largest octopus species and is known for its considerable intelligence, including the ability to open jars, solve mazes, and mimic other octopuses.
It's about ten-and-a-half times as heavy as a Toilet.
In other words, the weight of a Toilet is 0.0971 times 450,000 grams.(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 43,600 grams. The Indian town of Musiri in Tamil Nadu state features the world's only paying toilet, which rewards its users up to 10¢ Indian (10 paisas) per visit and uses the waste for compost and fertilizer.
It's about one-fifteenth as heavy as an Elephant.
In other words, the weight of an Elephant is 14 times 450,000 grams.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 6,100,000 grams. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 4,000,000 grams
It's about one-fifteenth as heavy as a Tyrannosaurus rex.
In other words, the weight of a Tyrannosaurus rex is 14 times 450,000 grams.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
The notable Tyrannosaurus specimen housed at the Field Museum of Natural History in Chicago, Illinois, "Sue," is estimated to have weighed about 6,400,000 grams while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.