A metric carat is exactly 200 milligrams.
Carats to Decagrams Converter — ct to dag
Convert Carat (ct) to Decagram (dag) using the exact conversion factor (1 carat = 0.02 decagram). See the formula, worked examples, and conversion table.
Carats to Decagrams 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.
Decagram is 10 gram units.
Result = input x 0.0002 / 0.01.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats to Decagrams
Weight conversions between Carat and Decagram 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 decagram is 10 gram units.
Formula
decagrams = carats × 0.02
This factor comes from each unit's defined relationship to the category's base unit: 1 carat equals 0.0002 base units, and 1 decagram equals 0.01 base units, so dividing one by the other gives the direct carat-to-decagram factor of 0.02.
Simple example
1 ct × 0.02 = 0.02 dag
1 carat = 0.02 decagrams.
Real-world example
50 ct × 0.02 = 1 dag
50 carats = 1 decagram.
Conversion table
| Carat (ct) | Decagram (dag) |
|---|---|
| 1 ct | 0.02 dag |
| 5 ct | 0.1 dag |
| 10 ct | 0.2 dag |
| 25 ct | 0.5 dag |
| 50 ct | 1 dag |
| 100 ct | 2 dag |
Reverse conversion: Decagram to Carat
0.02 dag × 50 = 1 ct
0.02 decagrams = 1 carat.
carats = decagrams × 50
For a page dedicated to this direction, see Decagram to Carat.
Understanding the Carat (ct)
A metric carat is exactly 200 milligrams.
Understanding the Decagram (dag)
Decagram is 10 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decagrams are in 1 carat?
1 carat equals 0.02 decagrams, using the exact defined conversion factor rather than an estimate.
How do I convert carat to decagram?
Multiply the carat value by 0.02. The converter above does this instantly to whatever precision you set.
How do I convert decagram back to carat?
Use the reverse factor: 1 decagram equals 50 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 decagram?
Decagram (dag) is a unit of mass/weight.
Is the carat to decagram conversion exact?
Yes. Both carat and decagram are defined by fixed standards rather than physical artifacts, so the factor of 0.02 used above is exact to as many digits as you choose to display.