It's about one-three-thousand-five-hundredth as heavy as a Beer Keg
In other words, 0.021 kilograms is 0.0002885 times the weight of a Beer Keg, and the weight of a Beer Keg is 3,466 times that amount.(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 72.80 kg when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about one-four-thousandth as heavy as a Kangaroo
In other words, 0.021 kilograms is 0.00025 times the weight of a Kangaroo, and the weight of a Kangaroo is 4,000 times that amount.(for red kangaroo, Macropus rufus) (adult, male)
An adult, male red kangaroo weighs up to 85 kg. Fantastic jumpers, red kangaroos can leap horizontally 9 m (30 ft) and vertically 3 m (9 ft) in a single bound.
It's about 5,000 times as heavy as a Grain of Sand
In other words, the weight of a Grain of Sand is 0.00021 times 0.021 kilograms.(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.00000440 kilograms. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 15.10 m (49.55 ft) in height.
It's about 6,000 times as heavy as a Sesame Seed
In other words, 0.021 kilograms is 5,770 times the weight of a Sesame Seed, and the weight of a Sesame Seed is 0.000173 times that amount.(Sesamum indicum)
A sesame seed weighs approximately 0.000003640 kilograms. The McDonald's Big Mac sandwich, which is well-known for its sesame seed top bun, accounts for the consumption of an estimated 2,009.32 kg of sesame seeds each day.
It's about one-seven-thousandth as heavy as a Panda Bear
In other words, 0.021 kilograms is 0.00014 times the weight of a Panda Bear, and the weight of a Panda Bear is 7,100 times that amount.(a.k.a. Giant Panda, Ailuropoda melanoleuca)(Adult, male)
An adult, male Giant Panda weighs up to 150 kg. Despite having the digestive system of a carnivore, the panda eats only bamboo and must eat up to 6.4 kg of it per day to compensate for the limited energy the plant provides.
It's about one-eight-thousandth as heavy as a Reindeer
In other words, 0.021 kilograms is 0.000127 times the weight of a Reindeer, and the weight of a Reindeer is 7,870 times that amount.(for Rangifer tarandus granti, adult, bull) (a.k.a. Caribou) ()Rangifer tarandus)
An adult, male reindeer weighs between 159 and 182 kg. Reindeer undertake a lengthy annual migration, with some herds traveling up to 5,000 km.
To all those observing, Merry Christmas from the Measure of Things.
It's about one-nine-thousandth as heavy as The Heart of a Blue Whale
In other words, 0.021 kilograms is 0.00011 times the weight of The Heart of a Blue Whale, and the weight of The Heart of a Blue Whale is 9,100 times that amount.(Balaenoptera musculus) (adult)
(for a 2014 specimen)
The heart of a blue whale weighs about 200 kilograms. These hearts pump an estimated 7,100 L (1,875 gal) of blood through the whale's massive body.