It's about as heavy as The Space Shuttle.
It's about two-thirds as heavy as a Blue Whale.
In other words, 78 tons is 0.677 times the weight of a Blue Whale, and the weight of a Blue Whale is 1.48 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 0.0000011 tons each.
It's about half as heavy as a House.
In other words, 78 tons is 0.454 times the weight of a House, and the weight of a House is 2.2 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 0.507 tons.
It's about six-and-a-half times as heavy as an Anchor of a Cruise Ship.
In other words, 78 tons is 6.26 times the weight of an Anchor of a Cruise Ship, and the weight of an Anchor of a Cruise Ship is 0.16 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 12.5 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-tenth as heavy as Christ the Redeemer (statue).
In other words, 78 tons is 0.111 times the weight of Christ the Redeemer (statue), and the weight of Christ the Redeemer (statue) is 9.01 times that amount.(a.k.a. O Cristo Redentor, a.k.a. Christo redemptor) (Rio de Janeiro, Brazil)
Christ the Redeemer weighs 700 tons. The statue overlooks the city of Rio de Janeiro from atop the 709.9-meter (2,329 ft) granite peak in the Tijuca Forest National Park.
It's about nine-and-a-half times as heavy as an Elephant.
In other words, 78 tons is 9.417 times the weight of an Elephant, and the weight of an Elephant is 0.1062 times that amount.(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs between 8.283 tons. Among African elephants, both males and females have tusks (female Asian elephants lack tusks) which can grow to 3 m (10 ft) and weigh up to 0.09921 tons.
It's about eleven times as heavy as a Tyrannosaurus rex.
In other words, the weight of a Tyrannosaurus rex is 0.091 times 78 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 7.1 tons while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.