Carats to Pounds
Convert carats to pounds instantly — one carat is 0.000440925 pounds.
| Carats | Pounds |
|---|---|
| 1 ct | 0.000441 lb |
| 2 ct | 0.000882 lb |
| 3 ct | 0.001323 lb |
| 5 ct | 0.002205 lb |
| 10 ct | 0.004409 lb |
| 25 ct | 0.011023 lb |
| 50 ct | 0.022046 lb |
| 100 ct | 0.044092 lb |
How to use
- Enter a value in the Carats field.
- The Pounds figure appears immediately — no button to press.
- Typing in the Pounds field converts back to Carats the same way.
- Use the reference table for the values that come up most often.
Carats to Pounds formula
To convert carats to pounds, multiply by 0.000440924524.
lb = ct × 0.000440924524
Why this factor: the carat and the pound are both defined against the kilogram, so dividing one definition by the other gives 0.000440924524 directly. Both definitions are set out in full below.
To go the other way, divide by 0.000440924524 — or use the Pounds to Carats converter, which is the same calculation reversed.
Worked example
Start with 25 ct. Multiply by 0.000440924524 to get 0.011023 lb.
25 ct × 0.000440924524 = 0.011023 lb
The converter above does this for any value you type, in either direction.
What is a carat?
A metric carat is the standard mass unit for gemstones.
Definition: Exactly 200 milligrams — that is, 0.2 gram — standardized internationally in 1907.
Where it is used: Diamond and gemstone weight throughout the jewellery trade.
Worth knowing: Do not confuse the carat (gemstone mass) with the karat (gold purity out of 24). A 1-carat diamond and 24-karat gold measure entirely different things.
What is a pound?
The pound is the primary unit of weight in the United States.
Definition: Exactly 0.45359237 kilogram since the 1959 International Yard and Pound Agreement — an exact definition, not a rounded one.
Where it is used: Body weight, grocery and produce pricing, shipping rates, and gym weights in the US.
Worth knowing: This is the avoirdupois pound. The troy pound used for precious metals is different (about 373 g).
Carats vs Pounds
The carat is a specialized unit while the pound is an imperial unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many pounds are in a carat?
One carat equals 0.000440924524 pounds.
What is the formula to convert carats to pounds?
Multiply the number of carats by 0.000440924524. To reverse it, divide by 0.000440924524 instead.
How do I convert pounds back to carats?
Divide by 0.000440924524, which is the same as multiplying by 2267.96185.
How many pounds are in 10 carats?
10 ct works out to 0.004409 lb.
Is there anything to watch out for with carats?
Do not confuse the carat (gemstone mass) with the karat (gold purity out of 24). A 1-carat diamond and 24-karat gold measure entirely different things.
How is the carat defined?
Exactly 200 milligrams — that is, 0.2 gram — standardized internationally in 1907.