If you know the exact density of a specific material and wish to obtain the accurate instead of average weight.
Average weight of a toy marble.
A marble is a small spherical toy often made from glass clay steel plastic or agate these balls vary in size.
The three smallest sizes of marbles are 12 mm in diameter 9 16 of an inch diameter and 5 8 of an inch diameter.
Marble size is a matter of preference for hobbyists but as of 2011 the national marbles tournament called for specific sized marbles for its competitions.
Even if it is just a guess.
According to the diameter you provided.
0 75 3 4 3 pi volume in in3.
Weight calculator marble granite stone miscellaneous.
Ans 16 4 conversion factor from in3 to cm3 28 95 cm3.
The 12 mm marbles are slightly smaller than a chinese checker marble.
If you have a kitchen scale find the weight of the whole bag then divide by the number of marbles you have.
Its about 75g per marble.
A penny is about 3 grams so that is a pretty good guess.
One glass toy marble with a diameter of 3 4 inches.
Most commonly they are about 13 mm 1 2 in in diameter but they may range from less than 1 mm 1 30 in to over 8 cm 3 in while some art glass marbles for display purposes are over 30 cm 12 in wide marbles can be used for a variety of games called marbles.