It's about one-and-one-tenth times as heavy as a Dalmatian
In other words, 30,000 grams is 1.02 times the weight of a Dalmatian, and the weight of a Dalmatian is 0.980 times that amount.(a.k.a. Dalmatinac, a.k.a. Carriage Dog, a.k.a. Spotted Coach Dog, a.k.a. Firehouse Dog) (FCI standard; male)
The Fédération Cynologique Internationale (FCI) calls for Dalmatians to weigh between 29,500 grams. The association of the breed with fire departments (and similarly with Budweiser Beer and its team of Clydesdales) stems from their affinity for horses, having been used historically as carriage dogs capable of guiding horse-drawn fire engines to the sites of blazes.
It's about seven-tenths as heavy as a Toilet
In other words, 30,000 grams is 0.6880 times the weight of a Toilet, and the weight of a Toilet is 1.450 times that amount.(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 43,600 grams. The Indian town of Musiri in Tamil Nadu state features the world's only paying toilet, which rewards its users up to 10¢ Indian (10 paisas) per visit and uses the waste for compost and fertilizer.
It's about three-fifths as heavy as an Octopus
In other words, the weight of an Octopus is 1.70 times 30,000 grams.(for Giant Pacific Octopus, Enteroctopus) (Adult, average)
The adult North Pacific Giant Octopus usually weighs around 50,000 grams. It is the largest octopus species and is known for its considerable intelligence, including the ability to open jars, solve mazes, and mimic other octopuses.
It's about two-and-a-half times as heavy as a Gold Bar
In other words, 30,000 grams is 2.4113059930 times the weight of a Gold Bar, and the weight of a Gold Bar is 0.41471302390 times that amount.(London Good Delivery bar)
A "London Good Delivery" gold bar — the variety commonly held by Central Banks — should weigh 12,441.390720 grams. The largest gold bar ever produced was minted by Mitsubishi Materials Corporation (a sibling company of the auto manufacturer) in 2005 and weighed 250,000 grams.
It's about two-fifths as heavy as a Beer Keg
In other words, 30,000 grams is 0.41210 times the weight of a Beer Keg, and the weight of a Beer Keg is 2.4270 times that amount.(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 72,800 grams when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about one-third as heavy as a Kangaroo
It's about three times as heavy as a Dachshund
In other words, the weight of a Dachshund is 0.30 times 30,000 grams.(a.k.a. "Wiener dog", a.k.a. Teckel, a.k.a. Dackel, a.k.a. "hot dog dog", a.k.a. "sausage dog", a.k.a. "doxie") (FCI standard; standard size)
The Fédération Cynologique Internationale (FCI) calls for dachshunds to weigh about 9,000 grams. Despite of their small size, a 2008 survey conducted by the University of Pennsylvania named dachshunds as the most aggressive dog breed.