Carat to Nanogram Converter

Mass Converter

26 units available

Decimals:

From

To

200,000,000

1 ct = 200,000,000 ng

Formula:

ng = ct × 200,000,000

With your value: 1 ct = 200,000,000 ng

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 Nanogram conversions

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

Carat to Nanogram Conversion Table

Carat (ct)	Nanogram (ng)
0.5	100,000,000
1	200,000,000
2	400,000,000
5	1,000,000,000
10	2,000,000,000
15	3,000,000,000
20	4,000,000,000
25	5,000,000,000
50	10,000,000,000
100	20,000,000,000
250	50,000,000,000
500	100,000,000,000
1000	200,000,000,000

Nanogram to Carat Conversion Table

Nanogram (ng)	Carat (ct)
0.5	2.500000e-9
1	5.000000e-9
2	1.000000e-8
5	2.500000e-8
10	5.000000e-8
15	7.500000e-8
20	1.000000e-7
25	1.250000e-7
50	2.500000e-7
100	5.000000e-7
250	1.250000e-6
500	2.500000e-6
1000	5.000000e-6

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

Nanogram (ng)

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 Nanogram

To convert from Carat (ct) to Nanogram (ng), multiply the value by 200,000,000.

Formula: ng = ct × 200,000,000

Reverse: ct = ng × 5.000000e-9

Step-by-Step Example

Start with your value in Carat. For example: 5 ct
Multiply by the conversion factor: 5 x 200,000,000
The result is: 1,000,000,000 ng

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 Nanogram

The nanogram (ng) is a unit of mass and weight. One nanogram equals 1.000000 × 10^-12 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 Nanogram are in 1 Carat?

There are exactly 200,000,000 Nanogram in 1 Carat. This means the conversion factor from Carat to Nanogram is 200,000,000.

What is the formula to convert Carat to Nanogram?

The formula to convert Carat to Nanogram is: ng = ct × 200,000,000. For example, to convert 10 Carat to Nanogram, you would multiply 10 by 200,000,000.

What is a Carat?