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    Mass Conversion

    4 Carat to Centigram

    Quick answer

    4 Carat (ct) equals

    80 cg

    To convert 4 Carats to Centigrams, multiply by 20. Therefore, 4 Carat (ct) equals 80 Centigram (cg).

    Formula: cg = ct × 20. Calculation: 4 × 20 = 80 cg.

    Convert Carat (ct) to Centigram (cg) online with our free unit converter. In mass, 1 ct = 20 cg. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Carat to Centigram

    1. Step 1 — start with the formula. cg = ct × 20
    2. Step 2 — substitute your figure. 4 ct × 20
    3. Step 3 — read the result. 4 ct = 80 cg
    4. Step 4 — check it in reverse. ct = cg × 0.05 returns 4 ct, which matches the figure you started with.

    Mass Converter

    26 units available

    Decimals:
    80

    4 ct = 80 cg

    Formula:

    cg = ct × 20

    With your value: 4 ct = 80 cg

    How big is that?

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

    Your value4.00 ct
    Paperclip (1.3× your value)5.00 ct
    AA battery (30× your value)120 ct
    Can of soda (4.9e+2× your value)1.95e+3 ct
    Bag of sugar (1.3e+3× your value)5.00e+3 ct
    House cat (5.6e+3× your value)2.25e+4 ct

    Other Carat to Centigram conversions

    1 ct to cg2 ct to cg3 ct to cg5 ct to cg6 ct to cg7 ct to cg8 ct to cgFull Carat to Centigram converter

    Carat to Centigram Conversion Table

    Carat (ct)Centigram (cg)
    0.510
    120
    240
    5100
    10200
    15300
    20400
    25500
    501,000
    1002,000
    2505,000
    50010,000
    100020,000

    Centigram to Carat Conversion Table

    Centigram (cg)Carat (ct)
    0.50.025
    10.05
    20.1
    50.25
    100.5
    150.75
    201
    251.25
    502.5
    1005
    25012.5
    50025
    100050

    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

    Centigram (cg)

    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 Centigram

    To convert from Carat (ct) to Centigram (cg), multiply the value by 20.

    Formula: cg = ct × 20

    Reverse: ct = cg × 0.05

    Step-by-Step Example

    1. Start with your value in Carat. For example: 5 ct
    2. Multiply by the conversion factor: 5 x 20
    3. The result is: 100 cg

    Carat and Centigram Relationship

    This calculation facilitates standardized conversion between recognized units of mass. Since 1 Carat equals approximately 20 Centigrams, the Carat represents a larger unit interval than the Centigram. Understanding the relationship between Carat and Centigram is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    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 of Carat: gemstones, diamonds, jewelry.

    About Centigram

    The Centigram (symbol: cg) is a recognized unit in the Metric (SI) measurement framework, utilized within mass applications for precision and standardized data representation.

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

    Frequently Asked Questions

    What is 4 Carat in Centigram?
    4 Carat equals 80 Centigram.
    How many Centigrams are in 1 Carat?
    There are exactly 20 Centigrams in 1 Carat. This means the conversion factor from Carat to Centigram is 20.
    What is the formula to convert Carat to Centigram?
    The formula to convert Carat to Centigram is: cg = ct × 20. For example, to convert 10 Carats to Centigrams, you would multiply 10 by 20.
    What is a Carat?
    The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
    What is a Centigram?
    The Centigram (symbol: cg) is a recognized unit in the Metric (SI) measurement framework, utilized within mass applications for precision and standardized data representation.
    What are the common uses of Carat?
    The Carat is commonly used in gemstones, diamonds, jewelry.

    Related Mass Conversions

    Kilogram → CentigramGram → CentigramMilligram → CentigramMicrogram → CentigramNanogram → CentigramPicogram → CentigramMetric Ton → CentigramPound → CentigramOunce → Centigram

    Cite this page

    UnitConvertLab. (2026). 4 Carat to Centigram. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/4-carat-to-centigram