Convert grains to stones for jewelry appraisals, pharmaceutical measurements, and gemstone weighing. Accurate calculator with historical context and professional examples.
1 grain equals 0.000010204051216920246 stone
Formula: st = gr × 0.0000102041
The grain and stone represent two distinct weight measurement systems with specialized applications. One grain equals approximately 0.00457 stones, making this conversion essential for professionals in jewelry, pharmaceuticals, and gemology. Understanding this relationship is crucial for accurate valuations and dosage calculations across industries that span centuries of measurement tradition.
Precision in grain-to-stone conversions directly impacts financial valuations in jewelry and gemstone markets, pharmaceutical accuracy in medication dispensing, and historical document interpretation. A single grain error in precious metal measurement can represent significant monetary loss—for example, miscalculating 100 grains by just 10% results in a 0.457-stone error, potentially worth hundreds of dollars in gold or silver transactions.
Jewelers and precious metals dealers work with grain measurements for fine gold, silver, and platinum work, while international markets often reference stone weights for gemstone and finished piece valuations. Converting between these systems ensures accurate pricing, inventory management, and compliance with international trade standards where both measurement systems remain in active use.
Pharmacists and compounding specialists use grain measurements for historical formulations and specialized medications, particularly in veterinary and traditional medicine contexts. Converting to stones helps verify batch calculations and ensures consistency with legacy formulations that predate metric standardization in pharmaceutical practice.
| grains | stones |
|---|---|
| 10 gr | 0.000102 st |
| 50 gr | 0.00051 st |
| 100 gr | 0.00102 st |
| 500 gr | 0.005102 st |
| 1000 gr | 0.010204 st |
Formula: st = gr × conversion factor
The grain is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
The stone is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
This grain to stone 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 stone equals 6,350 grains avoirdupois (or 6,750 grains troy, depending on the system). For practical conversion: 1 stone ≈ 6,350 grains. This means 1 grain = 0.001575 avoirdupois stones. In metric terms, 1 stone = 6.35029 kilograms and 1 grain = 64.79891 milligrams. For jewelry work, remember that 1 stone ≈ 2,057 carats (jewelry weight), which equals 6,350 grains avoirdupois.
Grain and stone measurements have deep historical roots in Western jewelry and pharmaceutical traditions spanning centuries. Many specialized suppliers, reference materials, and experienced craftspeople continue using these units for precision work and historical consistency. Additionally, international gemstone trading often references both traditional units and metric carats, requiring professionals to understand multiple systems. The grain's precision (1/7,000 pound) makes it ideal for fine precious metal work where small variations represent significant value differences.
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