It's about 300 times as heavy as a Bowling Ball
In other words, 31,000,000 grains is 295.2380950 times the weight of a Bowling Ball, and the weight of a Bowling Ball is 0.00338709678 times that amount.(most common selection among male bowlers)
With an allowable range of 77,000 grains, the most-preferred bowling ball weight among adult, male bowlers is 105,000 grains. Because regulation balls measure the same diameter irrespective of their weight, ball density varies by size and balls weighing less than about 77,161.79180 grains will float in water.
It's about one-three-hundredth as heavy as Christ the Redeemer (statue)
In other words, 31,000,000 grains is 0.00316 times the weight of Christ the Redeemer (statue), and the weight of Christ the Redeemer (statue) is 316 times that amount.(a.k.a. O Cristo Redentor, a.k.a. Christo redemptor) (Rio de Janeiro, Brazil)
Christ the Redeemer weighs 9,800,000,000 grains. The statue overlooks the city of Rio de Janeiro from atop the 709.9-meter (2,329 ft) granite peak in the Tijuca Forest National Park.
It's about 400 times as heavy as a Gallon of Paint
It's about 400 times as heavy as a Cat
In other words, the weight of a Cat is 0.003 times 31,000,000 grains.(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 one-six-hundred-fiftieth as heavy as a Tree (Sierra Redwood)
In other words, the weight of a Tree (Sierra Redwood) is 670 times 31,000,000 grains.(a.k.a. Giant Sequoia, a.k.a. Sierran redwood, a.k.a. Wellingtonia, a.k.a. "Big Tree", Sequoiadendron giganteum)
The weight of wood in a Giant Sequoia is 20,000,000,000 grains. General Sherman, a specimen in Sequoia National Park in Visalia, California, is the largest tree in the world by volume, with an estimated weight of about 29,000,000,000 grains.
It's about 700 times as heavy as a Brick
In other words, 31,000,000 grains is 690 times the weight of a Brick, and the weight of a Brick is 0.0014 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 900 times as heavy as a Chihuahua
In other words, 31,000,000 grains is 893 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.00112 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.