Carat (metric) (ct)
Exactly 200 milligrams (metric carat).
What is a carat?
- Symbol
- ct
- Quantity
- Weight & Mass
- Unit system
- metric
- Definition
- Exactly 200 milligrams (metric carat).
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used to weigh diamonds and other gemstones. Not to be confused with karat, which measures gold purity.
Carat (metric) in other weight & mass units
- 1 ct = 200000 µgMicrogram
- 1 ct = 200 mgMilligram
- 1 ct = 0.2 gCarat (metric) to Gram converter
- 1 ct = 0.0002 kgKilogram
- 1 ct = 2e-7 tTonne (metric ton)
- 1 ct ≈ 3.086471671 grGrain
- 1 ct ≈ 0.00705479239 ozOunce
- 1 ct ≈ 0.0004409245244 lbPound
- 1 ct ≈ 2.204622622e-7 short tnShort ton (US ton)
- 1 ct ≈ 1.968413055e-7 long tnLong ton (UK ton)
Carat (metric) quick reference
| Carat (metric) | Gram | Kilogram | Pound |
|---|---|---|---|
| 1 ct | = 0.2 g | = 0.0002 kg | ≈ 0.0004409245244 lb |
| 10 ct | = 2 g | = 0.002 kg | ≈ 0.004409245244 lb |
| 100 ct | = 20 g | = 0.02 kg | ≈ 0.04409245244 lb |
| 1000 ct | = 200 g | = 0.2 kg | ≈ 0.4409245244 lb |
Where the carat fits
The next smaller weight & mass unit is the grain (gr). 1 ct ≈ 3.086471671 gr, and 1 gr = 0.32399455 ct.
The next larger weight & mass unit is the gram (g). 1 ct = 0.2 g, and 1 g = 5 ct.
Frequently asked questions
- How many grams are in one carat?
- One carat = 0.2 g (grams).
- How many kilograms are in one carat?
- One carat = 0.0002 kg (kilograms).
- How many pounds are in one carat?
- One carat ≈ 0.0004409245244 lb (pounds).