It's about 80,000 times as heavy as a Light Bulb
In other words, the weight of a Light Bulb is 0.0000130 times 42,000,000 grains.(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 530 grains. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.
It's about 100,000 times as heavy as a Battery (AA)
In other words, 42,000,000 grains is 110,000 times the weight of a Battery (AA), and the weight of a Battery (AA) is 0.00000910 times that amount.(Alkaline)
An "AA" size battery weighs 370 grains. 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.
It's about one-one-hundred-thousandth as heavy as The Empire State Building
In other words, 42,000,000 grains is 0.000008220 times the weight of The Empire State Building, and the weight of The Empire State Building is 122,000 times that amount.(New York City, New York)
The Empire State Building weighs approximately 5,110,000,000,000 grains. About 4% of the building's weight is its 6,000 cu. m (200,000 cu. ft) of limestone façade.
It's about 150,000 times as heavy as a Mouse
In other words, the weight of a Mouse is 0.00000770 times 42,000,000 grains.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 320 grains. 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 200,000 times as heavy as a Compact disc
In other words, 42,000,000 grains is 180,000 times the weight of a Compact disc, and the weight of a Compact disc is 0.00000560 times that amount.(a.k.a. CD)
A compact disc typically weighs 230 grains. 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 250,000 times as heavy as a Battery (AAA)
In other words, the weight of a Battery (AAA) is 0.00000430 times 42,000,000 grains.(Alkaline)
An "AAA" size battery weighs 190 grains. 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-three-hundred-thousandth as heavy as The Golden Gate Bridge
In other words, 42,000,000 grains is 0.000003380 times the weight of The Golden Gate Bridge, and the weight of The Golden Gate Bridge is 296,000 times that amount.(San Francisco, California and Marin County, California) (Post 1986 weight reduction; total weight of bridge, anchorage, and approaches)
Following the completion of the 1986 project to eliminate excess material, the total weight of the Golden Gate Bridge — including its anchorages and approaches — is 12,400,000,000,000 grains. The two main cables in the spanning the bridge are spun out of a total of 129,000 km (80,200 mi) of wire.