Pennyweight
A pennyweight (dwt) is a unit of mass equal to 24 grains, 1⁄20 of a troy ounce, 1⁄240 of a troy pound, approximately 0.054857 avoirdupois ounce and exactly 1.55517384 grams. It is abbreviated dwt, d standing for denarius – (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd).
| Pennyweight | |
|---|---|
17th-century Irish weight, 8 dwt | |
| General information | |
| Unit system | Troy weight |
| Unit of | Mass |
| Symbol | dwt |
| Conversions | |
| 1 dwt in ... | ... is equal to ... |
| Troy | 1⁄240 troy pound |
| Avoirdupois | 0.05485714 oz |
| SI units | 1.555174 g |
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