It's about 1,500 times as heavy as a Human Brain.
In other words, 29,800,000 grains is 1,430 times the weight of a Human Brain, and the weight of a Human Brain is 0.000699 times that amount.(adult)
The average weight of an adult human brain is between 20,800 grains. 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 2,000 times as heavy as a liter of Water.
In other words, 29,800,000 grains is 1,930.9530 times the weight of a liter of Water, and the weight of a liter of Water is 0.000517879 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 15,432.790 grains 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 3,000 times as heavy as a Basketball.
In other words, 29,800,000 grains is 3,096.10389610 times the weight of a Basketball, and the weight of a Basketball is 0.00032298657718 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 9,625 grains. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about 4,500 times as heavy as a Football (Soccer).
In other words, the weight of a Football (Soccer) is 0.00022 times 29,800,000 grains.(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 6,300 grains and 6,900 grains. 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 4,500 times as heavy as a Football (American).
In other words, 29,800,000 grains is 4,697.5369458130 times the weight of a Football (American), and the weight of a Football (American) is 0.0002128775167785 times that amount.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 6,125 grains and 6,562.50 grains. 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 one-five-thousandth as heavy as The Eiffel Tower.
In other words, 29,800,000 grains is 0.000191 times the weight of The Eiffel Tower, and the weight of The Eiffel Tower is 5,240 times that amount.(a.k.a. La Tour Eiffel) (Paris, France) (total weight)
The Eiffel Tower weighs approximately 156,000,000,000 grains. Architected to be quickly assembled, the Tower contains only 930 cu. meters of solid material.
It's about 5,500 times as heavy as a Can of Soup.
In other words, the weight of a Can of Soup is 0.00018 times 29,800,000 grains.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 5,400 grains. 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.