Money weights in grams?

The 10p coin is minted from an alloy of 75% copper and 25% nickel. The 1968 version of the coin weighed 11.31 grams and had a diameter of 28.50 millimetres. In 1992 a smaller version weighing 6.50 grams and with a diameter of 24.50 millimetres was introduced. Apart from the reduction in size, the coin's design remained essentially unchanged. This downsizing took place a year after a similar reform of the five pence coin, and the new ten pence was in fact only a gram heavier and half a millimetre larger than the previously withdrawn five pence. All the older 10p and florin coins were withdrawn from circulation and demonetised from 1 July 1993. With the earlier withdrawal of the 5p and shilling coins, the 10p was the last of the "historical" coin sizes to be withdrawn.


Current British general circulation coins are dimensioned as follows - 1 Penny - 20.32 mm diameter, 1.65 mm thick, weigh 3.56 grams and are made from copper plated steel. The edge is plain. 2 Pence - 25.9 mm diameter, 2.03 mm thick, weigh 7.12 grams and are made from copper plated steel. The edge is plain. 5 Pence - 18 mm diameter, 1.7 mm thick, weigh 3.25 grams and are made from 75% copper and 25% nickel. The edge is milled. 10 Pence - 24.5 mm diameter, 1.85 mm thick, weigh 6.5 grams and are made from 75% copper and 25% nickel. The edge is milled. 20 Pence - 21.4 mm diameter, 1.7 mm thick, weigh 5 grams and are made from 84% copper and 16% nickel, and are seven sided. The edge is plain. 50 Pence - 27.3 mm diameter, 1.78 mm thick, weigh 8 grams and are made from 75% copper and 25% nickel, and are seven sided. The edge is plain. 1 Pound - 22.5 mm diameter, 3.15 mm thick, weigh 9.5 grams and are made from 70% copper, 24.5% zinc and 5.5% nickel. The edge is milled with incuse lettering or ornamentation. 2 Pound - 28.4 mm diameter, 2.5 mm thick, weigh 12 grams and are bimetal made from 76% copper, 20% zinc and 4% nickel in the outer ring, and the centre is 25% nickel and 75% copper. The edge is milled with incuse lettering. 5 Pound - 38.61 mm diameter, 2.5 mm thick, weigh 28.28 grams and are made from 75% copper and 25% nickel. The edge is milled with an inscription. Intended as a souvenir, but occasionally seen in circulation.