Convert Pennyweights to Nanograms
Convert Pennyweights (dwt) to Nanograms (ng) instantly and accurately.
Conversion Formula
ng = dwt × 1555173840
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.
About Nanograms
A nanogram (ng) is one billionth of a gram (10⁻⁹ g). This is the standard mass unit in analytical chemistry, pharmacology, and toxicology for detecting trace substances. Blood plasma concentrations of hormones, drugs, and environmental contaminants are routinely reported in nanograms per milliliter (ng/mL). A typical therapeutic blood level for many medications is in the range of 10-500 ng/mL. In forensic science, nanogram-level DNA quantities can be amplified by PCR to yield a full genetic profile.
Quick Reference Table
| Pennyweights (dwt) | Nanograms (ng) |
|---|---|
| 1 dwt | 1.555 × 109 ng |
| 2 dwt | 3.11 × 109 ng |
| 5 dwt | 7.776 × 109 ng |
| 10 dwt | 1.555 × 1010 ng |
| 25 dwt | 3.888 × 1010 ng |
| 50 dwt | 7.776 × 1010 ng |
| 100 dwt | 1.555 × 1011 ng |