Is 315 miligrams as heavy as a Billiard Ball?
It's about one-five-hundredth as heavy as a Billiard Ball
The weight of a Billiard Ball is about 163,009.757968750 miligrams.
(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 155,922.37718750 miligrams and 170,097.138750 miligrams. According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.
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