Milliwatt to Gigawatt Converter

Power Converter

22 units available

Decimals:

From

To

1.000000e-12

1 mW = 1.000000e-12 GW

Formula:

GW = mW × 1.000000e-12

With your value: 1 mW = 1.000000e-12 GW

How big is that?

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

Your value1.00 mW

LED bulb (9.0e+3× your value)9.00e+3 mW

Laptop (6.5e+4× your value)6.50e+4 mW

Microwave oven (1.0e+6× your value)1.00e+6 mW

Electric kettle (3.0e+6× your value)3.00e+6 mW

Family car engine (9.0e+7× your value)9.00e+7 mW

Other Milliwatt to Gigawatt conversions

2 mW to GW 3 mW to GW 4 mW to GW 5 mW to GW 6 mW to GW 7 mW to GW 8 mW to GW

Milliwatt to Gigawatt Conversion Table

Milliwatt (mW)	Gigawatt (GW)
0.5	5.000000e-13
1	1.000000e-12
2	2.000000e-12
5	5.000000e-12
10	1.000000e-11
15	1.500000e-11
20	2.000000e-11
25	2.500000e-11
50	5.000000e-11
100	1.000000e-10
250	2.500000e-10
500	5.000000e-10
1000	1.000000e-9

Gigawatt to Milliwatt Conversion Table

Gigawatt (GW)	Milliwatt (mW)
0.5	500,000,000,000
1	1.000000e+12
2	2.000000e+12
5	5.000000e+12
10	1.000000e+13
15	1.500000e+13
20	2.000000e+13
25	2.500000e+13
50	5.000000e+13
100	1.000000e+14
250	2.500000e+14
500	5.000000e+14
1000	1.000000e+15

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.

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

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

How to Convert Milliwatt to Gigawatt

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

Formula: GW = mW × 1.000000e-12

Reverse: mW = GW × 1.000000e+12

Step-by-Step Example

Start with your value in Milliwatt. For example: 5 mW
Multiply by the conversion factor: 5 x 1.000000e-12
The result is: 5.000000e-12 GW

About Milliwatt

The milliwatt (mW) is a unit of power. One milliwatt equals 0.001 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

About Gigawatt

The gigawatt (GW) is a unit of power. One gigawatt equals 1.000000 × 10^+9 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

Frequently Asked Questions

How many Gigawatt are in 1 Milliwatt?

There are exactly 1.000000e-12 Gigawatt in 1 Milliwatt. This means the conversion factor from Milliwatt to Gigawatt is 1.000000e-12.

What is the formula to convert Milliwatt to Gigawatt?

The formula to convert Milliwatt to Gigawatt is: GW = mW × 1.000000e-12. For example, to convert 10 Milliwatt to Gigawatt, you would multiply 10 by 1.000000e-12.

What is a Milliwatt?