Carats to Troy Ounces (ct to oz t) Converter
1 Carat equals 0.0064 Troy Ounces (1 ct = 0.0064 oz t). Convert Carats to Troy Ounces with formula, table, and examples.
One carat equals approximately 0.006430 troy ounces. The troy ounce (31.1035 grams) is the standard weight unit for precious metals like gold, silver, and platinum. Since a carat (0.2 grams) is roughly 1/155 of a troy ounce, this conversion is essential in the jewelry industry where gemstone weights in carats must be combined with metal weights in troy ounces for pricing and documentation.
How to Convert Carats to Troy Ounces
- Take your value in Carats
- Multiply by 0.0064301493
- Read the result in Troy Ounces
Common Carats to Troy Ounces Conversions
| Carats (ct) | Troy Ounces (oz t) | Status |
|---|---|---|
| 0.25 ct | 0.00160754 oz t | |
| 0.5 ct | 0.00321507 oz t | |
| 1 ct | 0.00643015 oz t | |
| 2 ct | 0.0128603 oz t | |
| 5 ct | 0.03215075 oz t | |
| 10 ct | 0.06430149 oz t | |
| 25 ct | 0.16075373 oz t | |
| 50 ct | 0.32150747 oz t | |
| 100 ct | 0.64301493 oz t | |
| 155.517 ct | 0.99999753 oz t | |
| 250 ct | 1.60753733 oz t | |
| 500 ct | 3.21507466 oz t | |
| 1,000 ct | 6.43014931 oz t | |
| 5,000 ct | 32.15074657 oz t |
Good to Know About Carats to Troy Ounces Conversion
The troy ounce has been the international gold standard since the Middle Ages. When financial news reports gold at '$2,000 an ounce,' the ounce is always troy. This creates an ongoing source of confusion: a troy ounce of gold sounds the same as a regular ounce but weighs 9.7% more. The coexistence of troy ounces (for metals) and carats (for gems) in the same jewelry shop is one of commerce's most enduring measurement dualities.
Carats to Troy Ounces: What You Need to Know
A jeweler crafting a gold ring with a 1-carat diamond works with two different weight systems simultaneously: the diamond is 0.2 grams (1 carat) while the gold might be 5 grams (0.161 troy ounces). Gold is priced per troy ounce on global markets, diamonds per carat. Understanding the relationship between the two units helps jewelers price finished pieces and calculate material costs accurately.
What is a Carat? ct
A carat is a unit of mass equal to exactly 200 milligrams (0.2 grams), used for measuring gemstones and pearls. Adopted internationally in 1907 by the Fourth General Conference on Weights and Measures.
Learn more about Carat →What is a Troy Ounce? oz t
A troy ounce is a unit of mass used for precious metals such as gold, silver, and platinum. It equals exactly 31.1034768 grams, about 10% heavier than the common avoirdupois ounce.
Learn more about Troy Ounce →Going the other way? Use our Troy Ounces to Carats converter.
Carats to Troy Ounces FAQ
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One troy ounce (31.1035 grams) equals approximately 155.517 carats. This comes from dividing 31.1035 grams by 0.2 grams per carat.
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A troy ounce is 31.1035 grams, about 9.7% heavier than the common avoirdupois ounce (28.3495 grams). Troy ounces are used exclusively for precious metals. When gold prices are quoted 'per ounce,' it always means per troy ounce.
Non-Frequently Asked Questions About Carats to Troy Ounces
Questions nobody should ask - but someone did.
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A troy ounce is 155.5 carats. At mid-range diamond prices (5,000 to 10,000 dollars per carat for decent quality), a troy ounce of diamonds would cost roughly 780,000 to 1.5 million dollars. Gold at 2,000 dollars per ounce is practically a bargain in comparison.
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The troy weight system is probably named after Troyes, a medieval French market city famous for its trade fairs - not the ancient city of Troy from Homer's Iliad. Priam's treasure was weighed in something, but it was not troy ounces. The naming coincidence has confused students of both history and measurement for centuries.
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At least two. The gold is priced in troy ounces, the diamonds in carats. If the clasp is stainless steel, add avoirdupois ounces. And if you bought it by the gram, that is the metric system too. A single piece of jewelry can simultaneously exist in four weight systems. Fashion is complicated.
Related Articles About Carats to Troy Ounces
Need the reverse? Use our Troy Ounces to Carats converter. See all Weight & Mass converters.