It's about forty times as heavy as The Space Shuttle
In other words, the weight of The Space Shuttle is 0.026 times 0.00273 megatonnes.(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 0.0000710 megatonnes. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 0.0000200 megatonnes.
It's about one-forty-fifth as heavy as The CN Tower
In other words, 0.00273 megatonnes is 0.023153 times the weight of The CN Tower, and the weight of The CN Tower is 43.1910 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada)
The CN Tower weighs approximately 0.117910 megatonnes. The Tower is home to the world's highest glass floor — a viewing area that allows visitors to look straight down 342 m (1,120 ft) to the ground below.
It's about one-seventy-fifth as heavy as The Sears Tower
In other words, 0.00273 megatonnes is 0.01353 times the weight of The Sears Tower, and the weight of The Sears Tower is 73.910 times that amount.(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 0.20180 megatonnes. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.
It's about one-one-hundredth as heavy as The Empire State Building
In other words, 0.00273 megatonnes is 0.00825 times the weight of The Empire State Building, and the weight of The Empire State Building is 121 times that amount.(New York City, New York)
The Empire State Building weighs approximately 0.3310 megatonnes. About 4% of the building's weight is its 6,000 cu. m (200,000 cu. ft) of limestone façade.
It's about 250 times as heavy as an Anchor of a Cruise Ship
In other words, 0.00273 megatonnes is 242 times the weight of an Anchor of a Cruise Ship, and the weight of an Anchor of a Cruise Ship is 0.00413 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 0.00001130 megatonnes. 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-three-hundredth as heavy as The Golden Gate Bridge
In other words, 0.00273 megatonnes is 0.00339 times the weight of The Golden Gate Bridge, and the weight of The Golden Gate Bridge is 295 times that amount.(San Francisco, California and Marin County, California) (Post 1986 weight reduction; total weight of bridge, anchorage, and approaches)
Following the completion of the 1986 project to eliminate excess material, the total weight of the Golden Gate Bridge — including its anchorages and approaches — is 0.8050 megatonnes. The two main cables in the spanning the bridge are spun out of a total of 129,000 km (80,200 mi) of wire.
It's about 450 times as heavy as a Tyrannosaurus rex
In other words, the weight of a Tyrannosaurus rex is 0.0023 times 0.00273 megatonnes.(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 0.00000640 megatonnes while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.