Skip to main content
    UnitConvertLab
    UnitConvertLAB
    Power Conversion

    20 Gigawatt to Milliwatt

    Quick answer

    20 Gigawatt (GW) equals

    2.000000e+13 mW

    To convert 20 Gigawatts to Milliwatts, multiply by 1.000000e+12. Therefore, 20 Gigawatt (GW) equals 2.000000e+13 Milliwatt (mW).

    Formula: mW = GW × 1.000000e+12. Calculation: 20 × 1.000000e+12 = 2.000000e+13 mW.

    Convert Gigawatt (GW) to Milliwatt (mW) online with our free unit converter. In power, 1 GW = 1.000000e+12 mW. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Gigawatt to Milliwatt

    1. Step 1 — start with the formula. mW = GW × 1.000000e+12
    2. Step 2 — substitute your figure. 20 GW × 1.000000e+12
    3. Step 3 — read the result. 20 GW = 2.000000e+13 mW
    4. Step 4 — check it in reverse. GW = mW × 1.000000e-12 returns 20 GW, which matches the figure you started with.

    Power Converter

    22 units available

    Decimals:
    2.000000e+13

    20 GW = 2.000000e+13 mW

    Formula:

    mW = GW × 1.000000e+12

    With your value: 20 GW = 2.000000e+13 mW

    How big is that?

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

    LED bulb (1/2.2e+9 your value)9.00e-9 GW
    Laptop (1/3.1e+8 your value)6.50e-8 GW
    Microwave oven (1/2.0e+7 your value)0.00000100 GW
    Electric kettle (1/6.7e+6 your value)0.00000300 GW
    Family car engine (1/2.2e+5 your value)0.0000900 GW
    Your value20.0 GW

    Other Gigawatt to Milliwatt conversions

    14 GW to mW15 GW to mW16 GW to mW18 GW to mW21 GW to mW24 GW to mW25 GW to mWFull Gigawatt to Milliwatt converter

    Gigawatt to Milliwatt Conversion Table

    Gigawatt (GW)Milliwatt (mW)
    0.5500,000,000,000
    11.000000e+12
    22.000000e+12
    55.000000e+12
    101.000000e+13
    151.500000e+13
    202.000000e+13
    252.500000e+13
    505.000000e+13
    1001.000000e+14
    2502.500000e+14
    5005.000000e+14
    10001.000000e+15

    Milliwatt to Gigawatt Conversion Table

    Milliwatt (mW)Gigawatt (GW)
    0.55.000000e-13
    11.000000e-12
    22.000000e-12
    55.000000e-12
    101.000000e-11
    151.500000e-11
    202.000000e-11
    252.500000e-11
    505.000000e-11
    1001.000000e-10
    2502.500000e-10
    5005.000000e-10
    10001.000000e-9

    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.

    Gigawatt (GW)

    Power

    Exact conversion

    Derived from the watt (1 W = 1 J/s).

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

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

    Milliwatt (mW)

    Power

    Exact conversion

    Derived from the watt (1 W = 1 J/s).

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

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

    How to Convert Gigawatt to Milliwatt

    To convert from Gigawatt (GW) to Milliwatt (mW), multiply the value by 1.000000e+12.

    Formula: mW = GW × 1.000000e+12

    Reverse: GW = mW × 1.000000e-12

    Step-by-Step Example

    1. Start with your value in Gigawatt. For example: 5 GW
    2. Multiply by the conversion factor: 5 x 1.000000e+12
    3. The result is: 5.000000e+12 mW

    Gigawatt and Milliwatt Relationship

    Both Gigawatt and Milliwatt belong to the Metric (SI) system, making this an intra-system conversion within power. Since 1 Gigawatt equals approximately 1.000e+12 Milliwatts, the Gigawatt represents a larger unit interval than the Milliwatt. Understanding the relationship between Gigawatt and Milliwatt is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    About Gigawatt

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

    Common uses of Gigawatt: power calculations, engineering and science, education.

    About Milliwatt

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

    Common uses of Milliwatt: power calculations, engineering and science, education.

    Frequently Asked Questions

    What is 20 Gigawatt in Milliwatt?
    20 Gigawatt equals 2.000000e+13 Milliwatt.
    How many Milliwatts are in 1 Gigawatt?
    There are exactly 1.000000e+12 Milliwatts in 1 Gigawatt. This means the conversion factor from Gigawatt to Milliwatt is 1.000000e+12.
    What is the formula to convert Gigawatt to Milliwatt?
    The formula to convert Gigawatt to Milliwatt is: mW = GW × 1.000000e+12. For example, to convert 10 Gigawatts to Milliwatts, you would multiply 10 by 1.000000e+12.
    What is a Gigawatt?
    The Gigawatt (symbol: GW) is a recognized unit in the Metric (SI) measurement framework, utilized within power applications for precision and standardized data representation.
    What is a Milliwatt?
    The Milliwatt (symbol: mW) is a recognized unit in the Metric (SI) measurement framework, utilized within power applications for precision and standardized data representation.
    What are the common uses of Gigawatt?
    The Gigawatt is commonly used in power calculations, engineering and science, education.

    Related Power Conversions

    Watt → MilliwattKilowatt → MilliwattMegawatt → MilliwattGigawatt → WattGigawatt → KilowattGigawatt → MegawattGigawatt → MicrowattGigawatt → Horsepower (Mech)Gigawatt → Horsepower (Metric)

    Cite this page

    UnitConvertLab. (2026). 20 Gigawatt to Milliwatt. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/20-gigawatt-to-milliwatt