Convert Ounces to Carats
1 ounce is 141.75 ct. One ounce is exactly 141.747615625 carats.
One ounce is 141.74762 carats. To convert ounces to carats, multiply by 141.74762; to go the other way, divide by 141.74762 or multiply by 0.0070547924. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. One sixteenth of a pound.
Factor checked against the defining standard · How we check
- Ounces × 141.74762
1 * 141.74762141.748 ct
1 ounce in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces (as entered) | 1 oz | — |
| pounds | 0.0625 lb | × 0.0625 |
| stone | 0.004464285714 st | × 0.00446428571429 |
| US tons | 0.00003125 ton | × 0.00003125 |
| micrograms | 28,349,523.13 mcg | × 28,349,523.125 |
| milligrams | 28,349.52313 mg | × 28,349.523125 |
| centigrams | 2,834.952313 cg | × 2,834.9523125 |
| grams | 28.34952313 g | × 28.349523125 |
| kilograms | 0.02834952313 kg | × 0.028349523125 |
| slugs | 0.001942559386 slug | × 0.00194255938572 |
| tonnes | 0.00002834952313 t | × 0.000028349523125 |
| carats | 141.7476156 ct | × 141.747615625 |
| troy ounces | 0.9114583333 ozt | × 0.911458333333 |
| grains | 437.5 gr | × 437.5 |
| long tons | 0.00002790178571 LT | × 0.0000279017857143 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert ounces to carats? The converter and the working
- 1.Take the measurement in ounces.
- 2.Multiply by 141.74762 — that is how many carats fit in one ounce.
- 3.To go back the other way, divide by 141.74762, or multiply by 0.0070547924.
Worked example: 25 ounces to carats
- Formula
- oz × 141.74762 = ct
- Arithmetic
- 25 × 141.74762 = 3,543.69 ct
- Answer
- 25 oz = 3,543.69 ct
The factor is rounded for display; the figure above is computed from the full value.
Ounces to carats conversion table
| Ounces | Carats |
|---|---|
| 1 oz | 141.75 ct |
| 2 oz | 283.5 ct |
| 3 oz | 425.24 ct |
| 4 oz | 566.99 ct |
| 5 oz | 708.74 ct |
| 6 oz | 850.49 ct |
| 7 oz | 992.23 ct |
| 8 oz | 1,133.98 ct |
| 9 oz | 1,275.73 ct |
| 10 oz | 1,417.48 ct |
| 12 oz | 1,700.97 ct |
| 15 oz | 2,126.21 ct |
| 20 oz | 2,834.95 ct |
| 25 oz | 3,543.69 ct |
| 50 oz | 7,087.38 ct |
| 100 oz | 14,174.76 ct |
| 200 oz | 28,349.52 ct |
| 300 oz | 42,524.28 ct |
| 500 oz | 70,873.81 ct |
| 1000 oz | 141,747.62 ct |
| 2000 oz | 283,495.23 ct |
| 5000 oz | 708,738.08 ct |
| 10000 oz | 1,417,476.16 ct |
What is an ounce?
One sixteenth of a pound. Not to be confused with the fluid ounce, which measures volume.
What is a carat?
Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.
How many carats are in an ounce?
One ounce is 141.74762 carats. Going the other way, one carat is 0.0070547924 ounces. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to an ounce.
Cite this page
- APA
- Rule Calculator. (2026). Convert Ounces to carats. Rule Calculator. https://rulecalculators.com/convert/ounce-to-carat
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- Chicago
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Questions people actually ask
- How many carats are in an ounce?
- 141.74762. Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.
- How do I convert carats back to ounces?
- Divide by 141.74762, or multiply by 0.0070547924 — they are the same operation.
Other weight conversions
Carats to ounces — the same conversion the other way.