It's about one-third as heavy as an Eye (Human)
In other words, the weight of an Eye (Human) is 2.90 times 0.00000000000250 megatonnes.(adult)
A fully developed eye (in a person over the age of thirteen), weighs about 0.00000000000710 megatonnes. The pupil of the eye varies depending on the amount of light it is exposed to, but typically measures about 4 mm across.
It's about three times as heavy as a Nail
In other words, 0.00000000000250 megatonnes is 3.20 times the weight of a Nail, and the weight of a Nail is 0.310 times that amount.(for 15-gauge, 2-inch, finishing nails)
A two-inch finishing nail weighs 0.000000000000790 megatonnes. Nails have been in use for more than 5,400 years and were ven used as a medium of exchange in ancient times.
It's about one-fifth as heavy as a Battery (AAA)
In other words, 0.00000000000250 megatonnes is 0.210 times the weight of a Battery (AAA), and the weight of a Battery (AAA) is 4.80 times that amount.(Alkaline)
An "AAA" size battery weighs 0.0000000000120 megatonnes. Batteries are named by the American National Standards Institute (ANSI) Committee C18 and AAA batteries were given their name because they were smaller than the "AA" and "A" size batteries which were invented first.
It's about one-fifth as heavy as a Compact disc
In other words, 0.00000000000250 megatonnes is 0.170 times the weight of a Compact disc, and the weight of a Compact disc is 5.90 times that amount.(a.k.a. CD)
A compact disc typically weighs 0.0000000000150 megatonnes. Data is stored on CDs by encoding into the track a series of tiny pits — each between 3.5 and 850 µm (0.00014 and 0.033 in) in length.
It's about one-tenth as heavy as a Mouse
In other words, 0.00000000000250 megatonnes is 0.120 times the weight of a Mouse, and the weight of a Mouse is 8.30 times that amount.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 0.0000000000210 megatonnes. While most mice typically live two to three years, the Methuselah Mouse Prize — an award administered by a non-profit organization which advances aging-related research — was once awarded to a team of scientists whose research resulted in a mouse living just under five years.
It's about ten times as heavy as a Raindrop
In other words, the weight of a Raindrop is 0.10 times 0.00000000000250 megatonnes.(a.k.a. drop, a.k.a. droplet) (average)
The weight of a raindrop depends heavily on the type of weather, but averages about 0.000000000000200 megatonnes. The familiar teardrop shape of a raindrop is actually an optical illusion, caused by the reflection of the light and the motion of the drop.
It's about one-tenth as heavy as a Battery (AA)
In other words, the weight of a Battery (AA) is 10 times 0.00000000000250 megatonnes.(Alkaline)
An "AA" size battery weighs 0.0000000000240 megatonnes. AA batteries came into common use during World War II and were given their name by the American National Standards Institute (ANSI) Committee C18 because they were smaller than the "A" size batteries which were invented first.