It's about 1,000,000 times as heavy as a Chihuahua
In other words, 0.00273 megatonnes is 1,210,000 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.0000008260 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 0.000000002250 megatonnes. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about 2,000,000 times as heavy as a Human Brain
In other words, 0.00273 megatonnes is 2,020,000 times the weight of a Human Brain, and the weight of a Human Brain is 0.0000004950 times that amount.(adult)
The average weight of an adult human brain is between 0.000000001350 megatonnes. In humans and primates, sight and vision utilize about 30 different parts of the brain which together account for about half of the brain's size.
It's about 2,500,000 times as heavy as a liter of Water
In other words, 0.00273 megatonnes is 2,729,924 times the weight of a liter of Water, and the weight of a liter of Water is 0.00000036631060 times that amount.(fresh; 4° C / 39.2° F; maximum density)
Contrary to popular belief, 1 liter (0.0.264172052358148 gal) of water at 4° C / 39.2° F (its point of maximum density) weighs 0.0000000010000280 megatonnes rather than 1 kg exactly. The total volume of water on the planet Earth is about 13,590,000,000,000,000,000 (13.59 quntillion) L (3,590,000,000,000,000,000 gallons).
It's about 4,500,000 times as heavy as a Basketball
In other words, 0.00273 megatonnes is 4,377,178.0056 times the weight of a Basketball, and the weight of a Basketball is 0.000000228457695510 times that amount.(NBA official ball standards, Size 7)
A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 0.000000000623689508750 megatonnes. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about 6,500,000 times as heavy as a Football (Soccer)
In other words, the weight of a Football (Soccer) is 0.000000160 times 0.00273 megatonnes.(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)
According to FIFA's Law of the Game number 2, a football must weigh between 0.000000000410 megatonnes and 0.000000000450 megatonnes. An artifact on display at the Smith Art Gallery in Museum in Stirling, Scotland is said to be the world's oldest football and is about one-third to one-half the size of a modern football.
It's about 6,500,000 times as heavy as a Football (American)
In other words, 0.00273 megatonnes is 6,641,235.5946450 times the weight of a Football (American), and the weight of a Football (American) is 0.00000015057439022440 times that amount.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 0.000000000396893323750 megatonnes and 0.0000000004252428468750 megatonnes. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.
It's about 8,000,000 times as heavy as a Can of Soup
In other words, 0.00273 megatonnes is 7,800,000 times the weight of a Can of Soup, and the weight of a Can of Soup is 0.000000130 times that amount.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 0.000000000350 megatonnes. Cans have been used to store soup and other foods since their invention in 1913, but a dedicated can opener was not developed until cans began to use thinner materials — prior to that time, cans were usually opened using various blunt instruments and tools.