Troy weight g, 12 oz t), while an avoirdupois pound is approximately 21.53% heavier at 7 000 grains (≈ 453.59 g). One troy ounce (oz t) is equal to grams. Also equal to avoirdupois ounces, exactly , or about 10% larger. The pennyweight symbol is "dwt". There are 24 grains in 1 dwt, and 20 dwt in one troy ounce. Because there were 12 troy ounces in the old troy pound, there would have been 240 pennyweights to the pound—the basis of the fact that the old British pound sterling of currency contained 240 pence. (However, prior to 1526, English pound sterling
Pennyweight the alternative drams and grains measurement has been used since a new set of scales was purchased by the Egton Bridge Old Gooseberry Society in 1937. As of 2018, the world record for the heaviest gooseberry of 41 dwt 11 gr was held by Kelvin Archer of Cheshire. The most common abbreviation for pennyweight is "dwt"; "d", for the Roman "denarius", was the abbreviation for "penny" before Decimalization of the British monetary system. Alternate abbreviations are "pwt" and "PW". Although the abbreviations are the same, the pennyweight bears no relation to the weight of the American penny nail. That name