A metric carat is exactly 200 milligrams.
Carats to Decigrams Converter — ct to dg
Convert Carat (ct) to Decigram (dg) using the exact conversion factor (1 carat = 2 decigram). See the formula, worked examples, and conversion table.
Carats to Decigrams converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
Decigram is 0.1 gram units.
Result = input x 0.0002 / 0.0001.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats to Decigrams
Weight conversions between Carat and Decigram come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Specifically: A metric carat is exactly 200 milligrams, and decigram is 0.1 gram units.
Formula
decigrams = carats × 2
This factor comes from each unit's defined relationship to the category's base unit: 1 carat equals 0.0002 base units, and 1 decigram equals 0.0001 base units, so dividing one by the other gives the direct carat-to-decigram factor of 2.
Simple example
1 ct × 2 = 2 dg
1 carat = 2 decigrams.
Real-world example
50 ct × 2 = 100 dg
50 carats = 100 decigrams.
Conversion table
| Carat (ct) | Decigram (dg) |
|---|---|
| 1 ct | 2 dg |
| 5 ct | 10 dg |
| 10 ct | 20 dg |
| 25 ct | 50 dg |
| 50 ct | 100 dg |
| 100 ct | 200 dg |
Reverse conversion: Decigram to Carat
2 dg × 0.5 = 1 ct
2 decigrams = 1 carat.
carats = decigrams × 0.5
For a page dedicated to this direction, see Decigram to Carat.
Understanding the Carat (ct)
A metric carat is exactly 200 milligrams.
Understanding the Decigram (dg)
Decigram is 0.1 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decigrams are in 1 carat?
1 carat equals 2 decigrams, using the exact defined conversion factor rather than an estimate.
How do I convert carat to decigram?
Multiply the carat value by 2. The converter above does this instantly to whatever precision you set.
How do I convert decigram back to carat?
Use the reverse factor: 1 decigram equals 0.5 carats. You can also use the swap control in the converter above to flip the direction instantly.
What is a carat?
Carat (ct) is a unit of mass/weight.
What is a decigram?
Decigram (dg) is a unit of mass/weight.
Is the carat to decigram conversion exact?
Yes. Both carat and decigram are defined by fixed standards rather than physical artifacts, so the factor of 2 used above is exact to as many digits as you choose to display.