Carats to Long Tons Converter

To convert a measurement in carats to long tons, multiply the value by 0.000000196841. The conversion factor comes from the relationship between both units and the kilogram.

For example, to convert 5 ct to long tons: 5 × 0.000000196841 = 0.000000984207 long ton.

A carat is a unit of mass for gemstones equal to exactly 200 milligrams (0.2 grams). The carat takes its name from the carob seed, once used as a counterweight for weighing gems. The metric carat of exactly 200 mg was adopted internationally in the early 20th century to standardize the gem trade.

Common uses of carats include: Diamond and gemstone weight; Jewelry pricing and grading; Pearl and precious stone trading; Gemological certification.

A long ton (imperial ton) is a unit of mass equal to 2,240 pounds or approximately 1,016.05 kilograms. The long ton is the traditional British ton, equal to 20 hundredweight of 112 pounds each. It was widely used in the shipping and coal industries and is very close in value to the metric tonne.

Common uses of long tons include: Ship displacement and cargo capacity; Historical British industrial and coal weights; Bulk commodity trading in imperial contexts; Naval and maritime tonnage references.

Here are some common values converted:

1 ct = 0.000000196841 long ton 5 ct = 0.000000984207 long ton 10 ct = 0.000001968413 long ton 50 ct = 0.000009842065 long ton 100 ct = 0.000019684131 long ton