Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 oz | 0.141747 ct | |
| 0.01 oz | 1.41747 ct | |
| 0.1 oz | 14.1747 ct | |
| 1 oz | 141.747 ct | |
| 5 oz | 708.737 ct | |
| 10 oz | 1417.47 ct | |
| 50 oz | 7087.37 ct | |
| 100 oz | 14174.7 ct | |
| 1000 oz | 141747 ct |
The Milligram (mg) and the Gram (g) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 oz = 141.7475 ct
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Ounce (oz) | Carat (ct) | Real-world context |
|---|---|---|
| 0.1 oz | 14.17475 ct | |
| 1 oz | 141.7475 ct | letter envelope |
| 5 oz | 708.7375 ct | |
| 10 oz | 1417.475 ct | |
| 100 oz | 14174.75 ct |
1 ounce (oz) equals exactly 141.7475 carats (ct). Use the formula: oz × 141.7475 = ct.
To convert ounces to carats, multiply your value in ounces by 141.7475. For example, 5 oz × 141.7475 = 708.7375 ct.
100 ounces = 14174.75 carats. Calculation: 100 × 141.7475 = 14174.75.
To convert carats back to ounces, divide by 141.7475 (or multiply by 0.0070548). Example: 10 ct ÷ 141.7475 = 0.07054798 oz.
Yes. This converter uses the internationally recognised exact conversion factor: 1 oz = 141.7475 ct. All calculations are performed in your browser with no rounding until display.
10 ounces = 1417.475 carats. Simply multiply by 141.7475.
Converting ounces to carats is commonly needed for jewellery valuation, gemstone trading, precious metal buying and selling, and hallmarking compliance where one system uses oz and another uses ct.
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 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 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).
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.