Carat to Decigram Converter

Mass Converter

26 units available

Decimals:

From

To

2

1 ct = 2 dg

Formula:

dg = ct × 2

With your value: 1 ct = 2 dg

How big is that?

Everyday references on a logarithmic scale, all expressed in carat so you can sanity-check the result.

Your value1.00 ct

Paperclip (5.0× your value)5.00 ct

AA battery (1.2e+2× your value)120 ct

Can of soda (2.0e+3× your value)1.95e+3 ct

Bag of sugar (5.0e+3× your value)5.00e+3 ct

House cat (2.3e+4× your value)2.25e+4 ct

Other Carat to Decigram conversions

2 ct to dg 3 ct to dg 4 ct to dg 5 ct to dg 6 ct to dg 7 ct to dg 8 ct to dg

Carat to Decigram Conversion Table

Carat (ct)	Decigram (dg)
0.5	1
1	2
2	4
5	10
10	20
15	30
20	40
25	50
50	100
100	200
250	500
500	1,000
1000	2,000

Decigram to Carat Conversion Table

Decigram (dg)	Carat (ct)
0.5	0.25
1	0.5
2	1
5	2.5
10	5
15	7.5
20	10
25	12.5
50	25
100	50
250	125
500	250
1000	500

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Carat (ct)

Mass

Conventional value

The metric carat is exactly 200 mg, agreed internationally in 1907.

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Decigram (dg)

Mass

Exact conversion

Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Carat to Decigram

To convert from Carat (ct) to Decigram (dg), multiply the value by 2.

Formula: dg = ct × 2

Reverse: ct = dg × 0.5

Step-by-Step Example

Start with your value in Carat. For example: 5 ct
Multiply by the conversion factor: 5 x 2
The result is: 10 dg

About Carat

The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.

Fun Fact: The word "carat" comes from the carob seed, which was used as a balance weight in ancient gem trading.

Common uses: gemstones, diamonds, jewelry.

About Decigram

The decigram (dg) is a unit of mass and weight. One decigram equals 0.0001 kilograms. UnitConvertLab converts it against every other mass unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: mass calculations, engineering and science, education.

Frequently Asked Questions

How many Decigram are in 1 Carat?

There are exactly 2 Decigram in 1 Carat. This means the conversion factor from Carat to Decigram is 2.

What is the formula to convert Carat to Decigram?

The formula to convert Carat to Decigram is: dg = ct × 2. For example, to convert 10 Carat to Decigram, you would multiply 10 by 2.

What is a Carat?