It's about four-fifths as heavy as a Panda Bear.
In other words, 3 firkins is 0.820 times the weight of a Panda Bear, and the weight of a Panda Bear is 1.20 times that amount.(a.k.a. Giant Panda, Ailuropoda melanoleuca)(Adult, male)
An adult, male Giant Panda weighs up to 3.70 firkins. Despite having the digestive system of a carnivore, the panda eats only bamboo and must eat up to 0.160 firkins of it per day to compensate for the limited energy the plant provides.
It's about three-fourths as heavy as a Reindeer.
In other words, the weight of a Reindeer is 1.350 times 3 firkins.(for Rangifer tarandus granti, adult, bull) (a.k.a. Caribou) ()Rangifer tarandus)
An adult, male reindeer weighs between 4.05 firkins. 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-and-two-fifths times as heavy as a Kangaroo.
It's about three-fifths as heavy as The Heart of a Blue Whale.
In other words, 3 firkins is 0.610 times the weight of The Heart of a Blue Whale, and the weight of The Heart of a Blue Whale is 1.60 times that amount.(Balaenoptera musculus) (adult)
(for a 2014 specimen)
The heart of a blue whale weighs about 4.90 firkins. These hearts pump an estimated 7,100 L (1,875 gal) of blood through the whale's massive body.
It's about one-and-two-thirds times as heavy as a Beer Keg.
In other words, 3 firkins is 1.6820 times the weight of a Beer Keg, and the weight of a Beer Keg is 0.59450 times that amount.(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 1.7830 firkins when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about half as heavy as a cubic meter of Snow.
In other words, 3 firkins is 0.530 times the weight of a cubic meter of Snow, and the weight of a cubic meter of Snow is 1.90 times that amount.(Freshly fallen, standard conditions; measurements taken in Norway, 1965-68)
One cubic meter of freshly fallen snow under standard conditions weighs an average of 5.60 firkins. Assembled in 2008, the world record largest snowman was constructed of 140,000 firkins of snow and stood 37.21 m (122.1 ft) tall.
It's about half as heavy as a Pig.
In other words, 3 firkins is 0.490 times the weight of a Pig, and the weight of a Pig is 2 times that amount.(Domestic pig, Sus scrofa domesticus, a.k.a. S. domesticus) (adult)
Domestic pigs weigh between 6.10 firkins. The titular character "Babe the pig" in the 1995 family film was played by 48 different American Yorkshire piglets due to the length of filming and the rate at which piglets reach adulthood.