Carat to Dram Converter

Mass Converter

26 units available

Decimals:

From

To

0.112877

1 ct = 0.112877 dr

Formula:

dr = ct × 0.1128766782

With your value: 1 ct = 0.11287668 dr

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 Dram conversions

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

Carat to Dram Conversion Table

Carat (ct)	Dram (dr)
0.5	0.056438
1	0.112877
2	0.225753
5	0.564383
10	1.128767
15	1.69315
20	2.257534
25	2.821917
50	5.643834
100	11.287668
250	28.21917
500	56.438339
1000	112.876678

Dram to Carat Conversion Table

Dram (dr)	Carat (ct)
0.5	4.429613
1	8.859226
2	17.718452
5	44.29613
10	88.59226
15	132.88839
20	177.18452
25	221.480649
50	442.961299
100	885.922598
250	2,214.806494
500	4,429.612988
1000	8,859.225977

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

Dram (dr)

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 Dram

To convert from Carat (ct) to Dram (dr), multiply the value by 0.1128766782.

Formula: dr = ct × 0.1128766782

Reverse: ct = dr × 8.8592259766

Step-by-Step Example

Start with your value in Carat. For example: 5 ct
Multiply by the conversion factor: 5 x 0.1128766782
The result is: 0.564383 dr

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 Dram

The dram (dr) is a unit of mass and weight. One dram equals 0.001771845195 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 Dram are in 1 Carat?

There are exactly 0.1128766782 Dram in 1 Carat. This means the conversion factor from Carat to Dram is 0.1128766782.

What is the formula to convert Carat to Dram?

The formula to convert Carat to Dram is: dr = ct × 0.1128766782. For example, to convert 10 Carat to Dram, you would multiply 10 by 0.1128766782.

What is a Carat?