A metric carat is exactly 200 milligrams.
Carats to Megagrams Converter — ct to Mg
Convert Carat (ct) to Megagram (Mg) using the exact conversion factor (1 carat = 2e-7 megagram). See the formula, worked examples, and conversion table.
Carats to Megagrams 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.
Megagram is 1000000 gram units.
Result = input x 0.0002 / 1000.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats to Megagrams
Weight conversions between Carat and Megagram 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 megagram is 1000000 gram units.
Formula
megagrams = carats × 2e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 carat equals 0.0002 base units, and 1 megagram equals 1000 base units, so dividing one by the other gives the direct carat-to-megagram factor of 2e-7.
Simple example
1 ct × 2e-7 = 2e-7 Mg
1 carat = 2e-7 megagrams.
Real-world example
50 ct × 2e-7 = 0.00001 Mg
50 carats = 0.00001 megagrams.
Conversion table
| Carat (ct) | Megagram (Mg) |
|---|---|
| 1 ct | 2e-7 Mg |
| 5 ct | 0.000001 Mg |
| 10 ct | 0.000002 Mg |
| 25 ct | 0.000005 Mg |
| 50 ct | 0.00001 Mg |
| 100 ct | 0.00002 Mg |
Reverse conversion: Megagram to Carat
2e-7 Mg × 5000000 = 1 ct
2e-7 megagrams = 1 carats.
carats = megagrams × 5000000
For a page dedicated to this direction, see Megagram to Carat.
Understanding the Carat (ct)
A metric carat is exactly 200 milligrams.
Understanding the Megagram (Mg)
Megagram is 1000000 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many megagrams are in 1 carat?
1 carat equals 2e-7 megagrams, using the exact defined conversion factor rather than an estimate.
How do I convert carat to megagram?
Multiply the carat value by 2e-7. The converter above does this instantly to whatever precision you set.
How do I convert megagram back to carat?
Use the reverse factor: 1 megagram equals 5,000,000 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 megagram?
Megagram (Mg) is a unit of mass/weight.
Is the carat to megagram conversion exact?
Yes. Both carat and megagram are defined by fixed standards rather than physical artifacts, so the factor of 2e-7 used above is exact to as many digits as you choose to display.