It's about one-one-hundred-fiftieth as heavy as a Blue Whale
In other words, 680 kilograms is 0.00651 times the weight of a Blue Whale, and the weight of a Blue Whale is 154 times that amount.(Balaenoptera musculus)
Blue whales weigh between 73,000 and 136,000 kg. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 0.001 kilograms each.
It's about 200 times as heavy as a Cat
In other words, the weight of a Cat is 0.005 times 680 kilograms.(Felis catus) (Domestic; healthy weight)
The average domestic cat should weigh between 4 and 5 kg. 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-two-hundred-fiftieth as heavy as a House
In other words, 680 kilograms is 0.00436 times the weight of a House, and the weight of a House is 229 times that amount.(149 sq. m, single-level, unfurnished)
A 149 sq. m (1,600 sq. ft), single-story, unfurnished house (without extensive masonry) of the type commonly found in America would weigh approximately 156,000 kg, based on the weight of the included materials. In contrast, a yurt — a type of dwelling structure popular among nomadic peoples of East Asia — typically weighs less than 458 kg.
It's about 250 times as heavy as a Brick
In other words, the weight of a Brick is 0.0043 times 680 kilograms.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 2.9 kg. 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 300 times as heavy as a Chihuahua
In other words, 680 kilograms is 302 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.00331 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 1.5 to 3 kg. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about 500 times as heavy as a Human Brain
In other words, 680 kilograms is 504 times the weight of a Human Brain, and the weight of a Human Brain is 0.00198 times that amount.(adult)
The average weight of an adult human brain is between 1.350 kilograms. 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 700 times as heavy as a liter of Water
In other words, 680 kilograms is 679.9810 times the weight of a liter of Water, and the weight of a liter of Water is 0.001470629 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 1.000028 kg 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).