Pennyweights to all other weight unit conversions


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, later used as the symbol of an old British penny.


  • The pennyweight is the common weight used in the valuation and measurement of precious metals.
  • Jewellers use the pennyweight in calculating the amount and cost of precious metals used in fabricating or casting jewellery.
  • Dentists and dental labs still use the pennyweight as the measure of precious metals in dental crowns and inlays

1 pennyweight = 24 grains = 1/20 Troy ounce = ‚Äč1/240 Troy pound = 1.55517384 grams

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Standard Units
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Micrograms {{micrograms}}
Milligrams {{mg}}
Ounces (oz) {{oz}}
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Other Units
Grain (gr) {{gr}}
Stones (st) {{st}}
Troy Ounces (toz) {{toz}}
Troy Pounds (tlb) {{tlb}}