Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 ct | 7.0548e-06 oz | |
| 0.01 ct | 7.0548e-05 oz | |
| 0.1 ct | 0.00070548 oz | |
| 1 ct | 0.0070548 oz | |
| 5 ct | 0.035274 oz | |
| 10 ct | 0.070548 oz | |
| 50 ct | 0.35274 oz | |
| 100 ct | 0.70548 oz | |
| 1000 ct | 7.0548 oz |
The Milligram (mg) and the Gram (g) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 ct = 0.007054798 oz
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Carat (ct) | Ounce (oz) | Real-world context |
|---|---|---|
| 1 ct | 0.0070548 oz | solitaire diamond |
| 100 ct | 0.70547981 oz | |
| 1000 ct | 7.0547981 oz | |
| 10000 ct | 70.5479814 oz | |
| 100000 ct | 705.4798 oz |
1 carat (ct) equals exactly 0.0070548 ounces (oz). Use the formula: ct × 0.0070548 = oz.
To convert carats to ounces, multiply your value in carats by 0.0070548. For example, 5 ct × 0.0070548 = 0.03527399 oz.
100 carats = 0.70547981 ounces. Calculation: 100 × 0.0070548 = 0.70547981.
To convert ounces back to carats, divide by 0.0070548 (or multiply by 141.7475). Example: 10 oz ÷ 0.0070548 = 1417.475 ct.
Yes. This converter uses the internationally recognised exact conversion factor: 1 ct = 0.0070548 oz. All calculations are performed in your browser with no rounding until display.
10 carats = 0.07054798 ounces. Simply multiply by 0.0070548.
Converting carats to ounces is commonly needed for jewellery valuation, gemstone trading, precious metal buying and selling, and hallmarking compliance where one system uses ct and another uses oz.
The metric carat (ct) is the unit of mass used worldwide for gemstones and pearls, equal to exactly 200 milligrams (0.2 g). It is distinct from "karat" (K), the measure of gold purity (24K = 100% gold). A 1-carat diamond weighs exactly 0.2 g; the famous 45.52-carat Hope Diamond weighs approximately 9.1 g.
The avoirdupois ounce (oz) equals exactly 28.349523125 grams or 1/16 of an avoirdupois pound. It is widely used in the US and UK for food portions, product packaging, and everyday measurements. Note that the troy ounce (31.1035 g), used for precious metals like gold and silver, is a different and heavier unit than the avoirdupois ounce.
The word "carat" derives from Greek keration (κεράτιον), meaning carob pod. Carob seeds were believed to have remarkably uniform weight and were used as counterweights for balancing precious stones. The carat value varied across countries (0.187–0.216 g) until the Fourth General Conference on Weights and Measures standardised the metric carat at exactly 200 mg in 1907. Most countries adopted the metric carat between 1914 and 1930.
Interesting fact: The largest gem-quality diamond ever found, the Cullinan Diamond (1905), weighed 3,106.75 carats (621.35 g) before being cut into 9 major and 96 minor stones, two of which are in the British Crown Jewels.
The word "ounce" derives from Latin uncia (a twelfth), originally 1/12 of the Roman pound. The avoirdupois ounce developed in medieval England specifically for the wool trade, creating a 16-ounce pound distinct from the Troy 12-ounce pound. The British Imperial system codified the ounce in 1824. The modern exact definition (28.349523125 g) was set by the 1959 International Yard and Pound Agreement.
Interesting fact: A troy ounce (31.1 g) used for gold is heavier than an avoirdupois ounce (28.35 g) used for food — so an "ounce" of gold contains more metal than an "ounce" of flour. A standard large hen's egg weighs approximately 56–63 grams (about 2 oz).