A metric carat is exactly 200 milligrams.
Carats to Drams Converter — ct to dr
Convert Carat (ct) to Dram (dr) using the exact conversion factor (1 carat = 0.1128766782 dram). See the formula, worked examples, and conversion table.
Carats to Drams 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.
An avoirdupois dram is 1/16 ounce.
Result = input x 0.0002 / 0.001771845195.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats to Drams
Weight conversions between Carat and Dram 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 an avoirdupois dram is 1/16 ounce.
Formula
drams = carats × 0.112876678239
This factor comes from each unit's defined relationship to the category's base unit: 1 carat equals 0.0002 base units, and 1 dram equals 0.00177184519531 base units, so dividing one by the other gives the direct carat-to-dram factor of 0.112876678239.
Simple example
1 ct × 0.1128766782 = 0.1128766782 dr
1 carat = 0.1128766782 drams.
Real-world example
50 ct × 0.1128766782 = 5.643833912 dr
50 carats = 5.643833912 drams.
Conversion table
| Carat (ct) | Dram (dr) |
|---|---|
| 1 ct | 0.1128766782 dr |
| 5 ct | 0.5643833912 dr |
| 10 ct | 1.128766782 dr |
| 25 ct | 2.821916956 dr |
| 50 ct | 5.643833912 dr |
| 100 ct | 11.28766782 dr |
Reverse conversion: Dram to Carat
0.1128766782 dr × 8.859225977 = 0.9999999997 ct
0.1128766782 drams = 0.9999999997 carats.
carats = drams × 8.85922597656
For a page dedicated to this direction, see Dram to Carat.
Understanding the Carat (ct)
A metric carat is exactly 200 milligrams.
Understanding the Dram (dr)
An avoirdupois dram is 1/16 ounce.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams are in 1 carat?
1 carat equals 0.1128766782 drams, using the exact defined conversion factor rather than an estimate.
How do I convert carat to dram?
Multiply the carat value by 0.1128766782. The converter above does this instantly to whatever precision you set.
How do I convert dram back to carat?
Use the reverse factor: 1 dram equals 8.859225977 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 dram?
Dram (dr) is a unit of mass/weight.
Is the carat to dram conversion exact?
Yes. Both carat and dram are defined by fixed standards rather than physical artifacts, so the factor of 0.1128766782 used above is exact to as many digits as you choose to display.