It's about 850 times as heavy as a Chihuahua
In other words, 29,800,000 grains is 858 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.0012 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 34,700 grains. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
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 0.00070 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 1,930.953 times the weight of a liter of Water, and the weight of a liter of Water is 0.00051788 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 3,096.1038961 times the weight of a Basketball, and the weight of a Basketball is 0.0003229865772 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, 29,800,000 grains is 4,500 times the weight of a Football (Soccer), and the weight of a Football (Soccer) is 0.0002 times that amount.(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 4,697.536945813 times the weight of a Football (American), and the weight of a Football (American) is 0.000212877516779 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 0.00019 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.