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Convert Long tons to Carats

1 long ton is 5,080,234.54 ct. One long ton is exactly 5080234.544 carats.

One long ton is 5.0802 × 10^+6 carats. To convert long tons to carats, multiply by 5.0802 × 10^+6; to go the other way, divide by 5.0802 × 10^+6 or multiply by 1.9684 × 10^-7. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 44. The British ton: 2,240 lb, against the US short ton’s 2,000 and the tonne’s 2,204.62.

Factor checked against the defining standard · How we check

Carats
5,080,234.54 ct
Long tons × 5.0802 × 10^+6
1 * 5080234.55,080,234.544 ct

1 long ton in every weight unit

1 long ton expressed in every weight unit
UnitValueExact factor
ounces35,840 oz× 35,840
pounds2,240 lb× 2,240
stone160 st× 160
US tons1.12 ton× 1.12
micrograms1,016,046,909,000 mcg× 1,016,046,908,800
milligrams1,016,046,909 mg× 1,016,046,908.8
centigrams101,604,690.9 cg× 101,604,690.88
grams1,016,046.909 g× 1,016,046.9088
kilograms1,016.046909 kg× 1,016.0469088
slugs69.62132838 slug× 69.6213283843
tonnes1.016046909 t× 1.0160469088
carats5,080,234.544 ct× 5,080,234.544
troy ounces32,666.66667 ozt× 32,666.6666667
grains15,680,000 gr× 15,680,000
long tons (as entered)1 LT—

Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.

How do you convert long tons to carats? The converter and the working

  1. 1.Take the measurement in long tons.
  2. 2.Multiply by 5.0802 × 10^+6 — that is how many carats fit in one long ton.
  3. 3.To go back the other way, divide by 5.0802 × 10^+6, or multiply by 1.9684 × 10^-7.

Worked example: 25 long tons to carats

Formula
LT × 5.0802 × 10^+6 = ct
Arithmetic
25 × 5.0802 × 10^+6 = 127,005,863.6 ct
Answer
25 LT = 127,005,863.6 ct

The factor is rounded for display; the figure above is computed from the full value.

Long tons to carats conversion table

Long tons to carats conversion table
Long tonsCarats
1 LT5,080,234.54 ct
2 LT10,160,469.09 ct
3 LT15,240,703.63 ct
4 LT20,320,938.18 ct
5 LT25,401,172.72 ct
6 LT30,481,407.26 ct
7 LT35,561,641.81 ct
8 LT40,641,876.35 ct
9 LT45,722,110.9 ct
10 LT50,802,345.44 ct
12 LT60,962,814.53 ct
15 LT76,203,518.16 ct
20 LT101,604,690.88 ct
25 LT127,005,863.6 ct
50 LT254,011,727.2 ct
100 LT508,023,454.4 ct
200 LT1,016,046,908.8 ct
300 LT1,524,070,363.2 ct
500 LT2,540,117,272 ct
1000 LT5,080,234,544 ct
2000 LT10,160,469,088 ct
5000 LT25,401,172,720 ct
10000 LT50,802,345,440 ct

What is a long ton?

The British ton: 2,240 lb, against the US short ton’s 2,000 and the tonne’s 2,204.62. Three units, one word, and shipping documents use all three.

What is a carat?

Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.

How many carats are in a long ton?

One long ton is 5.0802 × 10^+6 carats. Going the other way, one carat is 1.9684 × 10^-7 long tons. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.

Every weight unit here

The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a long ton.

Source: NIST Handbook 44 — mass and weight

Cite this page

APA
Rule Calculator. (2026). Convert Long tons to carats. Rule Calculator. https://rulecalculators.com/convert/long-ton-to-carat
MLA
"Convert Long tons to carats." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/long-ton-to-carat.
Chicago
Rule Calculator. "Convert Long tons to carats." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/long-ton-to-carat.

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Questions people actually ask

How many carats are in a long ton?
5.0802 × 10^+6. Exactly 200 milligrams, fixed by international agreement in 1907 after centuries of local carats. It weighs a gemstone; the karat that grades gold is a different word for a different thing — purity in twenty-fourths.
How do I convert carats back to long tons?
Divide by 5.0802 × 10^+6, or multiply by 1.9684 × 10^-7 — they are the same operation.

Other weight conversions

Carats to long tons — the same conversion the other way.

Calculators that work in weight