Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 ct | 2.205e-10 ton | |
| 0.01 ct | 2.20462e-09 ton | |
| 0.1 ct | 2.20462e-08 ton | |
| 1 ct | 2.20462e-07 ton | |
| 5 ct | 1.10231e-06 ton | |
| 10 ct | 2.20462e-06 ton | |
| 50 ct | 1.10231e-05 ton | |
| 100 ct | 2.20462e-05 ton | |
| 1000 ct | 0.000220462 ton |
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 = 2.204622e-7 ton
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) | US Short Ton (ton) | Real-world context |
|---|---|---|
| 1 ct | 2.2046e-07 ton | solitaire diamond |
| 1000 ct | 0.00022046 ton | |
| 1,000,000 ct | 0.2204622 ton | |
| 1.0000e+09 ct | 220.4622 ton | |
| 1.0000e+12 ct | 220462.199 ton |
1 carat (ct) equals exactly 2.2046e-07 US short tons (ton). Use the formula: ct × 2.2046e-07 = ton.
To convert carats to US short tons, multiply your value in carats by 2.2046e-07. For example, 5 ct × 2.2046e-07 = 1.1023e-06 ton.
100 carats = 2.2046e-05 US short tons. Calculation: 100 × 2.2046e-07 = 2.2046e-05.
To convert US short tons back to carats, divide by 2.2046e-07 (or multiply by 4,535,925). Example: 10 ton ÷ 2.2046e-07 = 45,359,250 ct.
Yes. This converter uses the internationally recognised exact conversion factor: 1 ct = 2.2046e-07 ton. All calculations are performed in your browser with no rounding until display.
10 carats = 2.2046e-06 US short tons. Simply multiply by 2.2046e-07.
Converting carats to US short tons is commonly needed for jewellery valuation, gemstone trading, precious metal buying and selling, and hallmarking compliance where one system uses ct and another uses ton.
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 US short ton (commonly just "ton" in American usage) equals exactly 2,000 avoirdupois pounds or approximately 907.18474 kilograms. It is the standard bulk commodity unit for coal, steel, cement, and freight in the United States. The "short" qualifier distinguishes it from the UK long ton (2,240 lb) and metric ton (1,000 kg).
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 short ton emerged in the United States as commerce adopted 2,000 pounds as a round-number bulk standard, diverging from the British 2,240-lb long ton. It was codified in the US Customary system in the 19th century. US coal production, steel output, and grain yields are still reported in short tons domestically, though international trade uses metric tons. The US is one of only three countries (with Myanmar and Liberia) not officially on the metric system.
Interesting fact: A fully loaded standard US freight car carries approximately 100 short tons of cargo. The US historically produced ~1 billion short tons of coal per year; modern US coal consumption has fallen to about 400–500 million short tons annually.