It's about two-thirds as heavy as The Space Shuttle.
In other words, the weight of The Space Shuttle is 1.60 times 50 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-fifths as heavy as a Blue Whale.
In other words, 50 tons is 0.4340 times the weight of a Blue Whale, and the weight of a Blue Whale is 2.30 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 three-tenths as heavy as a House.
In other words, 50 tons is 0.2910 times the weight of a House, and the weight of a House is 3.440 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 four times as heavy as an Anchor of a Cruise Ship.
In other words, 50 tons is 4.01 times the weight of an Anchor of a Cruise Ship, and the weight of an Anchor of a Cruise Ship is 0.2490 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 seven times as heavy as a Tyrannosaurus rex.
In other words, 50 tons is 7.10 times the weight of a Tyrannosaurus rex, and the weight of a Tyrannosaurus rex is 0.140 times that amount.(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 seven-and-a-half times as heavy as an Elephant.
In other words, the weight of an Elephant is 0.130 times 50 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 typically weigh about 4.40 tons
It's about twelve times as heavy as a Hippopotamus.
In other words, 50 tons is 12.10 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 0.0826 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).