Convert grains to pennyweights for jewelry, precious metals, and pharmaceutical applications. 1 grain = 0.041667 pennyweights. Accurate calculator for jewelers, assayers, and collectors.
1 grain equals 0.041666558668774785 pennyweight
Formula: dwt = gr × 0.0416667
The grain and pennyweight are traditional units of mass with deep historical roots in precious metals and pharmaceutical measurement. With 1 grain equaling approximately 0.041667 pennyweights (or conversely, 1 pennyweight equaling 24 grains), understanding this conversion is essential for jewelers, precious metals dealers, and pharmaceutical professionals working across different measurement traditions.
Precision in precious metals measurement directly impacts financial transactions worth thousands of dollars per ounce. A single grain error in gold or silver measurement can result in significant financial losses. Pharmaceutical dosing accuracy depends on correct grain-to-pennyweight conversions, particularly in traditional formulations. Legal standards for jewelry hallmarking and precious metals trading require accurate mass documentation using these units.
Jewelers and precious metals dealers use grains and pennyweights interchangeably when measuring gold, silver, and platinum. The pennyweight system originated from the troy ounce (480 grains) and remains standard in the jewelry industry across North America and Europe. Accurate conversion ensures correct pricing, weight documentation, and compliance with precious metals trading regulations.
Professional assayers and refinery operators measure precious metals using both grain and pennyweight units depending on client requirements and regional standards. The grain provides finer granularity for precise measurements, while pennyweights offer convenient whole numbers for larger quantities. Accurate conversion prevents measurement discrepancies in high-value transactions involving hundreds of troy ounces.
| grains | pennyweights |
|---|---|
| 10 gr | 0.416666 dwt |
| 50 gr | 2.083328 dwt |
| 100 gr | 4.166656 dwt |
| 500 gr | 20.833279 dwt |
| 1000 gr | 41.666559 dwt |
Formula: dwt = gr × conversion factor
The grain is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
The pennyweight is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
This grain to pennyweight converter uses high-precision conversion factors to ensure accurate results for professional and academic use.
Our calculator provides results with up to 10 decimal places for maximum accuracy.
One grain equals 0.041667 pennyweights (or 1/24 pennyweight). Conversely, 1 pennyweight equals exactly 24 grains. This 24:1 ratio is fundamental to the troy weight system. For example, a 72-grain gold coin equals exactly 3 pennyweights. This precise mathematical relationship makes conversion straightforward: simply divide grains by 24 to get pennyweights.
The troy weight system (including grains and pennyweights) remains deeply embedded in precious metals trading, pricing, and legal standards across North America and international markets. Precious metals futures contracts, jewelry manufacturing standards, and precious metals refining specifications all reference troy weights. The system's centuries-old standardization and the substantial existing infrastructure make conversion impractical. Additionally, the pennyweight provides convenient whole numbers for typical jewelry pieces (3-6 pennyweights), while metric units produce awkward decimal values.
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