It's about two-fifths as heavy as The Space Shuttle.
In other words, the weight of The Space Shuttle is 2.50 times 31.530 tons.(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 78 tons. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 22 tons.
It's about two-and-a-half times as heavy as an Anchor of a Cruise Ship.
In other words, 31.530 tons is 2.530 times the weight of an Anchor of a Cruise Ship, and the weight of an Anchor of a Cruise Ship is 0.3950 times that amount.(for QE2 forward anchor, a.k.a. RMS Queen Elizabeth 2)
Each of the forward anchors of the RMS Queen Elizabeth 2 weighs 12.50 tons. The anchor of the QE2 now sits in front of the Holyrood Church in Southampton, England, United Kingdom, along a pedestrian tourist route known as "the QE2 mile."
It's about one-fourth as heavy as a Blue Whale.
In other words, 31.530 tons is 0.2740 times the weight of a Blue Whale, and the weight of a Blue Whale is 3.650 times that amount.(Balaenoptera musculus)
Blue whales weigh between 115 tons. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 0.00000110 tons each.
It's about four-and-a-half times as heavy as a Tyrannosaurus rex.
In other words, the weight of a Tyrannosaurus rex is 0.220 times 31.530 tons.(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 7.10 tons while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.
It's about four-and-a-half times as heavy as an Elephant.
In other words, the weight of an Elephant is 0.210 times 31.530 tons.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 6.70 tons. 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 weigh up to 0.099 tons.
It's about one-fifth as heavy as a House.
In other words, 31.530 tons is 0.1830 times the weight of a House, and the weight of a House is 5.460 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 172 tons, 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 0.5070 tons.
It's about seven-and-a-half times as heavy as a Hippopotamus.
In other words, 31.530 tons is 7.630 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 0.1310 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 4.130 tons. 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).