It's about four times as heavy as a Chihuahua
In other words, 0.00000000910 megatonnes is 4.04 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 0.000000002250 megatonnes. 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, 0.00000000910 megatonnes is 0.2090 times the weight of a Toilet, and the weight of a Toilet is 4.780 times that amount.(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 0.00000004360 megatonnes. 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, 0.00000000910 megatonnes 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 0.0000000500 megatonnes. 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, 0.00000000910 megatonnes is 6.740 times the weight of a Human Brain, and the weight of a Human Brain is 0.1480 times that amount.(adult)
The average weight of an adult human brain is between 0.000000001350 megatonnes. 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, 0.00000000910 megatonnes is 0.1250 times the weight of a Beer Keg, and the weight of a Beer Keg is 8 times that amount.(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 0.00000007280 megatonnes when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about one-tenth as heavy as a Kangaroo
In other words, 0.00000000910 megatonnes 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 0.0000000850 megatonnes. Fantastic jumpers, red kangaroos can leap horizontally 9 m (30 ft) and vertically 3 m (9 ft) in a single bound.
It's about nine times as heavy as a liter of Water
In other words, 0.00000000910 megatonnes is 9.099745 times the weight of a liter of Water, and the weight of a liter of Water is 0.10989320 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 0.0000000010000280 megatonnes 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).