It's about as heavy as an Elephant.
(for African bush elephant, Loxodonta africana) (Adult, bull)
A bull African bush elephant weighs about 6,100,000 grams. Among African elephants, both males and females have tusks (whereas female Asian elephants, Elephas maximus, do not have tusks) which can grow to 3 m (10 ft) and typically weigh about 4,000,000 grams
It's about as heavy as a Tyrannosaurus rex.
In other words, the weight of a Tyrannosaurus rex is 1.10 times 6,100,000 grams.(for FMNH PR2081, a.k.a. "Sue") (a.k.a. Tyrannosaurus, a.k.a. T-Rex) (estimated live weight)
The notable Tyrannosaurus specimen housed at the Field Museum of Natural History in Chicago, Illinois, "Sue," is estimated to have weighed about 6,400,000 grams while alive. A renowned predator in popular culture, the teeth of tyrannosaurus rex were up to 33.02 cm (13 in) long.
It's about one-and-three-fifths times as heavy as a Hippopotamus.
In other words, 6,100,000 grams is 1.630 times the weight of a Hippopotamus, and the weight of a Hippopotamus is 0.6130 times that amount.(Hippopotamus amphibius) (adult, male)
The average weight of an adult male hippopotamus ranges from 3,750,000 grams. Appearances to the contrary, adult hippos cannot swim or float in water; they actually move by leaping and walking across lake bottoms at about 8 kph (5 mph).
It's about half as heavy as an Anchor of a Cruise Ship.
In other words, 6,100,000 grams is 0.540 times the weight of an Anchor of a Cruise Ship, and the weight of an Anchor of a Cruise Ship is 1.850 times that amount.(for QE2 forward anchor, a.k.a. RMS Queen Elizabeth 2)
Each of the forward anchors of the RMS Queen Elizabeth 2 weighs 11,300,000 grams. The anchor of the QE2 now sits in front of the Holyrood Church in Southampton, England, United Kingdom, along a pedestrian tourist route known as "the QE2 mile."
It's about two-and-a-half times as heavy as The Tongue of a Blue Whale.
In other words, the weight of The Tongue of a Blue Whale is 0.430 times 6,100,000 grams.(Balaenoptera musculus) (adult)
The tongue of a Blue Whale can weigh up to 2,700,000 grams. Despite their tremendous size, blue whales feed almost exclusively on tiny crustaceans called krill and cannot swallow anything much larger than a beach ball.
It's about two-and-a-half times as heavy as a Giraffe.
It's about three times as heavy as a Rhinoceros.
In other words, 6,100,000 grams is 2.90 times the weight of a Rhinoceros, and the weight of a Rhinoceros is 0.340 times that amount.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 2,100,000 grams. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.