Convert carats to pennyweights for jewelry appraisals, gemstone trading, and precious metal calculations. Accurate converter with industry examples and conversion factors.
1 carat equals 0.128603 pennyweight
Formula: dwt = ct × 0.128603
The carat and pennyweight are both units of mass used in precious metals and gemstone industries, though they measure different properties. One carat equals approximately 3.0865 pennyweights, a conversion essential for jewelers, gemologists, and precious metal traders working across different measurement traditions.
Precision in carat-to-pennyweight conversion directly impacts gemstone valuations, jewelry pricing, and precious metal transactions. A single carat error in a 5-carat diamond (approximately 15.43 pennyweights) can represent thousands of dollars in value difference, making accurate conversion critical for professional appraisals and international trade.
Jewelers and gemologists must convert between carats and pennyweights when sourcing materials internationally, pricing gemstones, and documenting inventory. The carat system measures gemstone weight and density, while pennyweight remains common in precious metals valuation. This conversion ensures accurate pricing across different market segments and regions.
Precious metals refiners and bullion dealers use both carat and pennyweight measurements depending on market context and customer base. Gold purity is measured in carats (24-carat gold = pure), while gold weight in troy systems uses pennyweights. Understanding this dual system is essential for accurate pricing and international transactions.
| carats | pennyweights |
|---|---|
| 10 ct | 1.28603 dwt |
| 50 ct | 6.43015 dwt |
| 100 ct | 12.8603 dwt |
| 500 ct | 64.3015 dwt |
| 1000 ct | 128.603 dwt |
Formula: dwt = ct × conversion factor
The carat 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 carat 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 carat equals 3.08647 pennyweights. This conversion is essential when comparing gemstone weights across different markets. For quick mental math, remember that 1 carat ≈ 3.1 pennyweights. A 2-carat diamond equals approximately 6.17 pennyweights. For insurance and appraisal purposes, always use the precise factor of 3.08647 to ensure accurate valuations, especially on high-value items where even small percentage errors translate to significant dollar amounts.
Carats measure gemstone weight exclusively (200 milligrams per carat), making them the universal standard for diamonds, rubies, sapphires, and emeralds. Pennyweights are part of the troy weight system used for precious metals like gold and silver. A jeweler working with an engagement ring must weigh the diamond in carats but may reference the gold setting in pennyweights or troy ounces. This dual system persists because international gemstone markets standardized on carats, while precious metals trading in English-speaking countries maintained the historical troy system.
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