It's about nine-tenths as heavy as a Chihuahua
In other words, 31,000 grains is 0.8930 times the weight of a Chihuahua, and the weight of a Chihuahua is 1.120 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 seven-tenths as heavy as a Brick
In other words, 31,000 grains is 0.690 times the weight of a Brick, and the weight of a Brick is 1.40 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 one-and-a-half times as heavy as a Human Brain
In other words, 31,000 grains is 1.490 times the weight of a Human Brain, and the weight of a Human Brain is 0.6710 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 two times as heavy as a liter of Water
In other words, 31,000 grains is 2.00871 times the weight of a liter of Water, and the weight of a liter of Water is 0.49783190 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 two-fifths as heavy as a Gallon of Paint
It's about two-fifths as heavy as a Cat
It's about three times as heavy as a Basketball
In other words, 31,000 grains is 3.22077922080 times the weight of a Basketball, and the weight of a Basketball is 0.310483870970 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