Convert weight and mass units — kilograms, pounds, grams, ounces, tons, carats and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 ct | 4.40925e-07 lb | |
| 0.01 ct | 4.40925e-06 lb | |
| 0.1 ct | 4.40925e-05 lb | |
| 1 ct | 0.000440925 lb | |
| 5 ct | 0.00220462 lb | |
| 10 ct | 0.00440925 lb | |
| 50 ct | 0.0220462 lb | |
| 100 ct | 0.0440925 lb | |
| 1000 ct | 0.440925 lb |
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 = 0.0004409249 lb
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) | Pound (lb) | Real-world context |
|---|---|---|
| 1 ct | 0.00044092 lb | solitaire diamond |
| 100 ct | 0.04409249 lb | |
| 1000 ct | 0.44092488 lb | |
| 10000 ct | 4.4092488 lb | |
| 100000 ct | 44.0924884 lb |
1 carat (ct) equals exactly 0.00044092 pounds (lb). Use the formula: ct × 0.00044092 = lb.
To convert carats to pounds, multiply your value in carats by 0.00044092. For example, 5 ct × 0.00044092 = 0.00220462 lb.
100 carats = 0.04409249 pounds. Calculation: 100 × 0.00044092 = 0.04409249.
To convert pounds back to carats, divide by 0.00044092 (or multiply by 2267.96). Example: 10 lb ÷ 0.00044092 = 22679.6 ct.
Yes. This converter uses the internationally recognised exact conversion factor: 1 ct = 0.00044092 lb. All calculations are performed in your browser with no rounding until display.
10 carats = 0.00440925 pounds. Simply multiply by 0.00044092.
Converting carats to pounds is commonly needed for jewellery valuation, gemstone trading, precious metal buying and selling, and hallmarking compliance where one system uses ct and another uses lb.
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 pound (lb) is the primary unit of mass in the US customary and British imperial systems, equal to exactly 453.59237 grams since the International Yard and Pound Agreement of 1959. It is subdivided into 16 ounces. The abbreviation "lb" comes from the Latin libra (scales/balance), while "pound" derives from Latin pondus (weight).
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 pound traces its origins to ancient Rome's libra pondo (pound weight, ~329 g). Various standards existed in medieval Europe — Troy, Tower, and merchant pounds — until the avoirdupois pound emerged in 13th–14th century England for general trade. The British Weights and Measures Act 1878 formalised it. The modern definition (453.59237 g) was fixed by the US, UK, Australia, Canada, New Zealand, and South Africa in 1959.
Interesting fact: The word "pound sterling" originally meant one pound (12 troy ounces) of sterling silver. Today's British pound currency takes its name from the unit of mass, not the other way around.