It's about four times as heavy as a Chihuahua.
In other words, 20 pounds is 4.03 times the weight of a Chihuahua, and the weight of a Chihuahua is 0.2480 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 4.960 pounds. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about one-fifth as heavy as a Toilet.
In other words, 20 pounds is 0.2080 times the weight of a Toilet, and the weight of a Toilet is 4.810 times that amount.(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 96.10 pounds. 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 one-fifth as heavy as an Octopus.
In other words, 20 pounds is 0.180 times the weight of an Octopus, and the weight of an Octopus is 5.60 times that amount.(for Giant Pacific Octopus, Enteroctopus) (Adult, average)
The adult North Pacific Giant Octopus usually weighs around 110 pounds. 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 six-and-a-half times as heavy as a Human Brain.
In other words, 20 pounds is 6.720 times the weight of a Human Brain, and the weight of a Human Brain is 0.1490 times that amount.(adult)
The average weight of an adult human brain is between 2.980 pounds. 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 one-tenth as heavy as a Beer Keg.
In other words, 20 pounds is 0.12460 times the weight of a Beer Keg, and the weight of a Beer Keg is 8.026 times that amount.(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 160.50 pounds when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about nine times as heavy as a liter of Water.
In other words, 20 pounds is 9.071593 times the weight of a liter of Water, and the weight of a liter of Water is 0.11023420 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 2.2046840 pounds 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).
It's about one-tenth as heavy as a Kangaroo.
In other words, 20 pounds is 0.110 times the weight of a Kangaroo, and the weight of a Kangaroo is 9.10 times that amount.(for red kangaroo, Macropus rufus) (adult, male)
An adult, male red kangaroo weighs up to 190 pounds. Fantastic jumpers, red kangaroos can leap horizontally 9 m (30 ft) and vertically 3 m (9 ft) in a single bound.