It's about 450 times as heavy as an Elephant
In other words, the weight of an Elephant is 0.0022 times 0.00273 megatonnes.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 0.00000610 megatonnes. 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 0.00000400 megatonnes
It's about 750 times as heavy as a Hippopotamus
In other words, 0.00273 megatonnes is 728 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 0.00137 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 0.000003750 megatonnes. 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 1,000 times as heavy as The Tongue of a Blue Whale
In other words, the weight of The Tongue of a Blue Whale is 0.001 times 0.00273 megatonnes.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 0.00000270 megatonnes. 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 1,500 times as heavy as a Rhinoceros
In other words, the weight of a Rhinoceros is 0.00077 times 0.00273 megatonnes.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 0.00000210 megatonnes. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.
It's about 1,500 times as heavy as a Giraffe
In other words, 0.00273 megatonnes is 1,410 times the weight of a Giraffe, and the weight of a Giraffe is 0.000709 times that amount.(Giraffa camelopardalis reticulata) (adult, male, maximum of range)
An adult, male giraffe can weigh up to 0.000001930 megatonnes. Reaching 5.5 m (18 ft) in height by adulthood, giraffe calves can grow as much as 3 cm (1 in) per day.
It's about 1,500 times as heavy as a Car
In other words, 0.00273 megatonnes is 1,653 times the weight of a Car, and the weight of a Car is 0.000605 times that amount.(for 2009 Ford Taurus) (curb weight)
A 2009 Ford Taurus weighs 0.0000016520 megatonnes. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 0.0000003860 megatonnes.
It's about one-two-thousandth as heavy as The Great Pyramid of Giza
In other words, 0.00273 megatonnes is 0.00046 times the weight of The Great Pyramid of Giza, and the weight of The Great Pyramid of Giza is 2,200 times that amount.(a.k.a. Pyramid of Khufu, a.k.a. Pyramid of Cheops) (Cairo, Egypt)
The Great Pyramid of Giza has an estimated mass of 5.90 megatonnes. The 2,300,000 stones used in the construction of the pyramid weighed an average 0.00000230 megatonnes and were quarried from distances of up to 805 km (500 mi) away.