How Do You Convert Troy Ounces to Carats?
Multiply troy ounces by 155.517 to get carats. The formula is: Carats = Troy Ounces x 155.517. This works because 1 troy ounce = 31.1035 grams and 1 carat = 0.2 grams, so 31.1035 / 0.2 = 155.5175.
Sam Okafor weighs a gold pendant at 0.8 troy ounces and wants to know the equivalent in gemstone terms for a comparison chart. Converting: 0.8 x 155.517 = 124.4 carats. The pendant weighs the same as 124 one-carat diamonds, giving his client a relatable way to understand the gold weight.
Troy Ounces to Carats Reference Table
| Troy Ounces | Carats | Also Equals |
|---|---|---|
| 0.1 oz t | 15.6 ct | 3.11 g |
| 0.25 oz t | 38.9 ct | 7.78 g |
| 0.5 oz t | 77.8 ct | 15.55 g |
| 1 oz t | 155.5 ct | 31.10 g |
| 5 oz t | 777.6 ct | 155.52 g |
| 10 oz t | 1,555.2 ct | 311.04 g |
| 32.15 oz t | 5,000.0 ct | 1,000.00 g |
Practical Applications
Jewelry Manufacturing
Leah Nguyen commissions custom cake-topper charms from a local jeweler. The jeweler quotes 1.2 troy ounces of sterling silver per charm. She converts to carats for comparison: 1.2 x 155.517 = 186.6 carats. Knowing this helps her compare the metal weight to the small gemstone accents (3 carats each) in the design.
Investment Portfolio Tracking
Tom Brewer tracks his precious metals and gemstone investments in a spreadsheet. He owns 15 troy ounces of gold and wants to express his total precious holdings in carats: 15 x 155.517 = 2,332.8 carats of gold weight, plus 45 carats of loose diamonds. His total portfolio is 2,377.8 carats — a unified metric for comparison.
Auction House Cataloging
Priya Patel writes catalog descriptions for a charity auction. An antique gold watch weighs 3.6 troy ounces. Converting: 3.6 x 155.517 = 559.9 carats. She includes both measurements in the listing because international bidders may prefer either troy ounces or carats depending on their region.