Convert ounces to carats for jewelry appraisal, gemstone valuation, and precious metal trading. Accurate calculator with industry standards and real-world examples.
1 ounce equals 141.7474627204173 carat
Formula: ct = oz × 141.748
The conversion between ounces and carats is essential for jewelry professionals and gemstone traders worldwide. One ounce equals exactly 311.035 carats, a critical relationship in the gemstone and precious metals industry. Understanding this conversion ensures accurate pricing, proper documentation, and compliance with international trading standards.
Precision in ounce-to-carat conversion directly impacts gemstone valuation, insurance claims, and international jewelry transactions. A single carat can represent hundreds of dollars in diamond or precious stone value. Incorrect conversions lead to significant financial losses, legal disputes, and compromised authenticity documentation. The jewelry industry depends on this conversion for certification, grading, and fair market pricing across all global markets.
Jewelry appraisers and gemologists regularly convert ounce measurements to carats when receiving bulk gemstones or evaluating collections. International gem dealers often receive shipments measured in ounces but must certify and price individual stones in carats. This conversion is fundamental to accurate appraisal reports, insurance valuations, and auction cataloging.
Bullion dealers and precious metals traders convert ounce weights to carats when trading high-purity gold, platinum, and silver. While carats are less common for metals than for gemstones, international traders use this conversion for standardized documentation and cross-border transactions. Refineries use this conversion when certifying precious metal purity and weight.
| ounces | carats |
|---|---|
| 1 oz | 141.747463 ct |
| 2 oz | 283.494925 ct |
| 5 oz | 708.737314 ct |
| 10 oz | 1417.474627 ct |
| 20 oz | 2834.949254 ct |
Formula: ct = oz × conversion factor
The ounce is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
The carat is a widely used unit for measuring weight. It is commonly used in various applications and industries worldwide.
This ounce to carat 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 avoirdupois ounce equals exactly 311.035 carats. However, if you're working with precious metals, one troy ounce equals 155.517 carats. The difference is crucial: avoirdupois ounces (28.3495 grams) are used for general goods and gemstones, while troy ounces (31.1035 grams) are the standard for precious metals. Always verify which ounce measurement you're using before converting.
Carats provide greater precision for small, high-value items. One carat equals 200 milligrams, allowing jewelers to measure fractional weights of gemstones with accuracy. Ounces, being much larger units, would require decimal notation for individual stones. The carat system became the international standard for gemstones through the Metric Carat Convention of 1913, ensuring consistent valuation globally regardless of local measurement systems.
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