It's about 0.000000010 times as heavy as a Cat
In other words, 0.000903 grains is 0.00000001000 times the weight of a Cat, and the weight of a Cat is 100,000,000 times that amount.(Felis catus) (Domestic; healthy weight)
The average domestic cat should weigh between 70,000 grains. Cats are known for their righting reflex, which allows them to land on their feet and survive falls from heights of 1 m (3 ft) up to about 21 m.
It's about 0.00000002 times as heavy as a Brick
In other words, 0.000903 grains is 0.0000000200 times the weight of a Brick, and the weight of a Brick is 50,000,000 times that amount.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 45,000 grains. The steeple of the Church of St. Martin in Landshut, Germany is said to be the tallest brick tower in the world at a height of 130.6 m (428.5 ft) and was constructed using an estimated 650,000 bricks.
It's about 0.00000003 times as heavy as a Chihuahua
In other words, 0.000903 grains is 0.0000000260 times the weight of a Chihuahua, and the weight of a Chihuahua is 38,500,000 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 0.00000005 times as heavy as a Human Brain
In other words, 0.000903 grains is 0.00000004330 times the weight of a Human Brain, and the weight of a Human Brain is 23,100,000 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 0.00000006 times as heavy as a liter of Water
In other words, 0.000903 grains is 0.000000058511780 times the weight of a liter of Water, and the weight of a liter of Water is 17,090,580 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 0.00000010 times as heavy as a Basketball
In other words, 0.000903 grains is 0.0000000938181818180 times the weight of a Basketball, and the weight of a Basketball is 10,658,914.7290 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 0.0000002 times as heavy as a Football (Soccer)
In other words, 0.000903 grains is 0.000000140 times the weight of a Football (Soccer), and the weight of a Football (Soccer) is 7,100,000 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.