A metric carat is exactly 200 milligrams.
Carats to Long tons Converter — ct to long ton
Convert Carat (ct) to Long ton (long ton) using the exact conversion factor (1 carat = 1.968413e-7 long ton). See the formula, worked examples, and conversion table.
Carats to Long tons 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.
A British long ton is 2,240 pounds.
Result = input x 0.0002 / 1016.046909.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Carats to Long tons
Weight conversions between Carat and Long ton 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 a British long ton is 2,240 pounds.
Formula
long tons = carats × 1.968413e-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 long ton equals 1016.0469088 base units, so dividing one by the other gives the direct carat-to-long ton factor of 1.968413e-7.
Simple example
1 ct × 1.968413e-7 = 1.968413e-7 long ton
1 carat = 1.968413e-7 long tons.
Real-world example
50 ct × 1.968413e-7 = 0.0000098421 long ton
50 carats = 0.0000098421 long tons.
Conversion table
| Carat (ct) | Long ton (long ton) |
|---|---|
| 1 ct | 1.968413e-7 long ton |
| 5 ct | 9.842065e-7 long ton |
| 10 ct | 0.0000019684 long ton |
| 25 ct | 0.000004921 long ton |
| 50 ct | 0.0000098421 long ton |
| 100 ct | 0.0000196841 long ton |
Reverse conversion: Long ton to Carat
1.968413e-7 long ton × 5080234.544 = 0.9999999719 ct
1.968413e-7 long tons = 0.9999999719 carats.
carats = long tons × 5080234.544
For a page dedicated to this direction, see Long ton to Carat.
Understanding the Carat (ct)
A metric carat is exactly 200 milligrams.
Understanding the Long ton (long ton)
A British long ton is 2,240 pounds.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many long tons are in 1 carat?
1 carat equals 1.968413e-7 long tons, using the exact defined conversion factor rather than an estimate.
How do I convert carat to long ton?
Multiply the carat value by 1.968413e-7. The converter above does this instantly to whatever precision you set.
How do I convert long ton back to carat?
Use the reverse factor: 1 long ton equals 5,080,234.544 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 long ton?
Long ton (long ton) is a unit of mass/weight.
Is the carat to long ton conversion exact?
Yes. Both carat and long ton are defined by fixed standards rather than physical artifacts, so the factor of 1.968413e-7 used above is exact to as many digits as you choose to display.