Convert carats to UK tons

1 ct=1.9684e-7ton (UK)

Use the converter below to change any carats value into UK tons instantly — with formula, conversion table, and real-world examples.

You have

Equals

1.9684e-7

Conversion formula

Forward

UK tons = carats × 1.9684e-7

Reverse

carats = UK tons × 5,080,234.54

Example: 10 ct × 1.9684e-7 = 1.9684e-6 ton (UK).

About both units

From

Carat

The metric carat equals 200 milligrams exactly. It is the standard unit for gemstone weight — diamonds, rubies, sapphires and emeralds are sold by the carat. Do not confuse with the purity carat (karat) used for gold (24K = pure gold).

Real-world: A 1-carat diamond weighs 200 mg and is typically 6.5 mm across. The Hope Diamond is 45.52 carats (9.1 g).

Read full carat reference →

UK Ton

ton (UK)

The UK long ton equals 2240 pounds or 1016.05 kilograms. It is the traditional British weight unit for shipping, steel and coal, and is 1.6% larger than the metric ton. Rarely used in modern commerce but appears on older contracts and historical records.

Real-world: Pre-1971 British ship displacements were given in long tons. UK steel output before EU harmonisation used long tons.

Read full uk ton reference →

Carat to UK Ton conversion table

Common carats to UK tons values for quick reference.

Carat (ct)	UK Ton (ton (UK))
1 ct	1.9684e-7 ton (UK)
5 ct	9.8421e-7 ton (UK)
10 ct	1.9684e-6 ton (UK)
25 ct	4.9210e-6 ton (UK)
50 ct	9.8421e-6 ton (UK)
100 ct	1.9684e-5 ton (UK)
250 ct	4.9210e-5 ton (UK)
500 ct	9.8421e-5 ton (UK)
1,000 ct	0.0001968 ton (UK)
5,000 ct	0.0009842 ton (UK)

Tips & common mistakes

Quick tips

1 carat = 200 mg = 0.2 g exactly since 1907.
Carat (gem weight) and karat (gold purity, 24 K = pure) are different words with different meanings.
A carat is divided into 100 points; a 0.25 ct diamond is called a "25-pointer".

Avoid these

Confusing carat (mass) with karat (gold purity).
Assuming a 2-carat diamond is twice the physical size of a 1-carat — volume scales with cube root of mass.
Using "karat" on gemstone certificates — international standard is "carat" spelled with a C.

Frequently asked questions

How many UK tons in a carat?

One carat equals 1.9684e-7 UK tons.

How do I convert carats to UK tons?

Multiply the carat value by 1.9684e-7 to get the equivalent in UK tons.

What is 100 carats in UK tons?

100 carats equals 1.9684e-5 UK tons.

Is a carat bigger than a uk ton?

No. 1 carat equals 1.9684e-7 UK tons, so one carat is smaller.

How to convert carats to UK tons without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

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📊 See full comparison matrix →

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