Approx 1252 cubic millimetres = 1.252 millilitres.
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Assuming you mean a US $1 coin, all you need are its specifications and a bit of basic geometry: The coin has a diameter of 26.5 mm; i.e. a radius of 13.25 mm, and a height (thickness) of 2.00 mm. Using the formula for the volume of cylinder V = Π * r**2 * h, the volume is approximately 3.1416 * 13.25**2 *2.00 = 1103 cubic millimeters.
A pound coin is 2.25 cm in diameter and 3.15mm thick. Therefore the volume of a pound coin is 1252.5 cubic millimetres or approx. 1.25 cubic centimetres.
Well, honey, a 20 cent coin is about 22.25 mm in diameter and 1.57 mm thick. A 1 liter bottle has a diameter of around 78 mm. So, if we do the math, you could probably fit about 15-20 20 cent coins in that bottle if you squish them in there real good. But hey, who's counting?
1 = 9.5 gm (UK 1 Pound coin) 1,000 = 9.5 kg 1,000,000 = 9,500 kg
If you refer to a copper coin, simply place it in a measuring glass of water and work out the difference between the start and final volumes; that is the volume of the coin.