It's about one-tenth as heavy as a Grand Piano.
In other words, 54,000 grams is 0.120 times the weight of a Grand Piano, and the weight of a Grand Piano is 8.30 times that amount.(for Steinway & Sons, Model D Concert Grand Piano)
A Grand Piano, of the kind used for concert performances in large music halls, weighs 450,000 grams. Well-made pianos such as this may last 75 to 100 years.
It's about one-tenth as heavy as a Polar Bear.
In other words, 54,000 grams is 0.1050 times the weight of a Polar Bear, and the weight of a Polar Bear is 9.520 times that amount.(Ursus maritimus) (adult, male)
An adult, male polar bear weighs between 516,000 grams. Polar bears are so heavily insulated by their 9.9 cm (3.9 in) layer of blubber that they are often difficult to detect using infrared photography sensors.
It's about one-tenth as heavy as a Grizzly Bear.
In other words, 54,000 grams is 0.1040 times the weight of a Grizzly Bear, and the weight of a Grizzly Bear is 9.620 times that amount.(a.k.a. brown bear, a.k.a. silver bear, Ursus arctos horribilis) (Adult, male, coastal area population average)
An adult, male grizzly bear from a coastal area (where food is plentiful) can weigh up to 521,000 grams. In spite of their tremendous size, grizzly bears can run at speeds of up to 55 kph (34 mph).
It's about ten times as heavy as a Gallon of Paint.
It's about ten times as heavy as a Cat.
In other words, the weight of a Cat is 0.10 times 54,000 grams.(Felis catus) (Domestic; healthy weight)
The average domestic cat should weigh between 5,000 grams. 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-fifteenth as heavy as a Cow.
In other words, the weight of a Cow is 13 times 54,000 grams.(for Holstein, a.k.a. Holstein Friesian, a.k.a. Friesian, Bos primigenius) (adult, heifer)
A mature Holstein cow (the well-known black-and-white, spotted breed of cow) typically weighs 680,000 grams. President William Howard Taft (1909 - 1913) kept a Holstein cow named Pauline Wayne on the White House grounds — a gift from a Wisconsin senator and the source of the First Family's milk.
It's about nineteen times as heavy as a Brick.
In other words, the weight of a Brick is 0.053 times 54,000 grams.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 2,900 grams. 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.