Convert Gigatons to Pennyweights
Convert Gigatons (Gt) to Pennyweights (dwt) instantly and accurately.
Conversion Formula
dwt = Gt × 643014931400000
About Gigatons
A gigaton (Gt) equals one billion metric tonnes (10¹² kg). It is the standard unit for planetary-scale mass measurements and global environmental budgets. Annual human CO₂ emissions are approximately 37 Gt CO₂; Earth's atmosphere contains roughly 5,480 Gt of air; Antarctic ice sheet mass is around 26,500,000 Gt of ice. Climate scientists report ice sheet mass balance changes in gigatons per year - the Greenland ice sheet loses approximately 280 Gt of ice annually due to climate change.
About Pennyweights
A pennyweight (dwt or pwt) equals 24 grains or 1/20 of a troy ounce - approximately 1.555 grams. Its name derives from the weight of an English silver penny in the medieval period. Pennyweights are the standard unit used by jewellers and goldsmiths in North America for weighing precious metals: gold, silver, and platinum. When a jeweller quotes the gold weight of a ring or chain, they typically use pennyweights. Gold buyers, refiners, and scrap metal dealers quote prices per pennyweight (often abbreviated 'DWT') when appraising jewellery.
Quick Reference Table
| Gigatons (Gt) | Pennyweights (dwt) |
|---|---|
| 1 Gt | 6.43 × 1014 dwt |
| 2 Gt | 1.286 × 1015 dwt |
| 5 Gt | 3.215 × 1015 dwt |
| 10 Gt | 6.43 × 1015 dwt |
| 25 Gt | 1.608 × 1016 dwt |
| 50 Gt | 3.215 × 1016 dwt |
| 100 Gt | 6.43 × 1016 dwt |