Convert Carats to Pounds
1 carat (ct) equals 0.0004409245244 pounds (lb).
1 ct = 0.0004409245244 lb
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk carat to pound converter to paste a column from Excel.
How to Convert Carat to Pound
- 1 ct = 0.0004409245244 lb
- 1 lb = 2267.96185 ct
- Example: convert 15 ct to lb: 15 ct = 15 × 0.0004409245244 lb = 0.006613867866 lb
Reference conditions. lb: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
lb = ct × 0.0004409245243698
or lb = ct ÷ 2267.96185
Derivation from SI units:
- 1 ct = 200 mg (metric carat, exact)
- 1 lb = 0.45359237 kg (exact, 1959 international agreement)
- 1 ct = 0.0002 kg ÷ 0.45359237 kg per lb = 0.0004409245243698 lb
Both units are defined exactly, so the factor is exact. Carat definition: carat; Pound definition: pound.
Worked examples
- A reading of 0.75 ct converts to 0.0003306933933 lb.
0.75 ct × 0.0004409245244 = 0.0003306933933 lb - A value of 3 ct is 0.001322773573 lb.
3 ct × 0.0004409245244 = 0.001322773573 lb
Carat to Pound conversion table
| Carats (ct) | Pounds (lb) |
|---|---|
| 0.1 ct | 0.00004409245244 lb |
| 0.25 ct | 0.0001102311311 lb |
| 0.5 ct | 0.0002204622622 lb |
| 0.75 ct | 0.0003306933933 lb |
| 1 ct | 0.0004409245244 lb |
| 1.5 ct | 0.0006613867866 lb |
| 2 ct | 0.0008818490487 lb |
| 3 ct | 0.001322773573 lb |
| 5 ct | 0.002204622622 lb |
| 10 ct | 0.004409245244 lb |
| 100 ct | 0.04409245244 lb |
Where it's used
Carats are used for diamonds and gemstones, while pounds appear in body weight and food in the US. Both measure mass (commonly called weight), so the conversion is a fixed factor.
Carat to other weight and mass units
| Conversion | 1 ct equals |
|---|---|
| carat to kilogram | 0.0002 kg |
| carat to gram | 0.2 g |
| carat to milligram | 200 mg |
| carat to microgram | 200000 µg |
| carat to metric ton | 2 × 10⁻⁷ t |
| carat to pound | 0.0004409245244 lb |
| carat to ounce | 0.00705479239 oz |
| carat to stone | 0.00003149460888 st |
| carat to short ton | 2.204622622 × 10⁻⁷ ton (US) |
| carat to long ton | 1.968413055 × 10⁻⁷ ton (UK) |
| carat to grain | 3.086471671 gr |
| carat to troy ounce | 0.006430149314 oz t |
Frequently asked questions
How many pounds are in 1 carat?
1 ct = 0.0004409245244 lb.
How do I convert carats to pounds?
Multiply the value in ct by 0.0004409245244, or divide it by 2267.96185. For example, 15 ct × 0.0004409245244 = 0.006613867866 lb.
Is the ct to lb conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "carat, metric".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound (avoirdupois) (lb)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Carats to Pounds. Retrieved October 17, 2026, from https://scientificconverters.com/mass/carats-to-pounds/
IEEE
Scientific Converters, "Convert Carats to Pounds," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/carats-to-pounds/