Carats to Long Tons Conversion

Enter the weight in carats below to get the value converted to long tons.

Results in Long Tons:
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1 ct = 1.9684E-7 lt
Hint: use a scientific notation calculator to convert E notation to decimal
Do you want to convert long tons to carats?

How to Convert Carats to Long Tons

Scales are used to measure weight

To convert a carat measurement to a long ton measurement, multiply the weight by the conversion ratio.

Since one carat is equal to 1.9684E-7 long tons, you can use this simple formula to convert:

long tons = carats × 1.9684E-7

The weight in long tons is equal to the carats multiplied by 1.9684E-7.

For example, here's how to convert 5,000,000 carats to long tons using the formula above.
5,000,000 ct = (5,000,000 × 1.9684E-7) = 0.984207 lt

Carats and long tons are both units used to measure weight. Keep reading to learn more about each unit of measure.


The carat is a unit of mass/weight equal to 200 milligrams.[1]

A carat is sometimes also referred to as a metric carat. Carats can be abbreviated as ct, and are also sometimes abbreviated as CD. For example, 1 carat can be written as 1 ct or 1 CD.

Long Tons

One long ton is equal to 2,240 pounds and is mostly used in the United Kingdom as a unit of mass/weight.[2] Long tons are not the same as the short ton, which is used mostly in the United States, or the metric ton which is used throughout the world.

The long ton is an imperial unit of weight. A long ton is sometimes also referred to as an imperial ton or displacement ton. Long tons can be abbreviated as lt, and are also sometimes abbreviated as t. For example, 1 long ton can be written as 1 lt or 1 t.

Carat to Long Ton Conversion Table

Carat measurements converted to long tons
Carats Long Tons
1 ct 0.00000019684 lt
2 ct 0.00000039368 lt
3 ct 0.00000059052 lt
4 ct 0.00000078737 lt
5 ct 0.00000098421 lt
6 ct 0.000001181 lt
7 ct 0.0000013779 lt
8 ct 0.0000015747 lt
9 ct 0.0000017716 lt
10 ct 0.0000019684 lt
100 ct 0.000019684 lt
1,000 ct 0.000197 lt
10,000 ct 0.001968 lt
100,000 ct 0.019684 lt
1,000,000 ct 0.196841 lt
10,000,000 ct 1.9684 lt


  1. National Institute of Standards and Technology, Precious Metals Conversion Information,
  2. State of California Division of Measurement Standards, Brief History of Weights and Measures,