Convert Milliwatts (mW) to Gigawatts (GW)

1 milliwatt equals 1 × 10⁻¹² gigawatts.

Formula: GW = mW × 1 × 10⁻¹²

Milliwatt to Gigawatt Converter

Choose the type of measurement to convert
Select the source unit to convert from
Select the target unit to convert to
Enter a numeric value or fraction to convert
Sig. Figures:

How to Convert Milliwatt to Gigawatt

1 milliwatt = 1 × 10-12 gigawatts

Gigawatt = Milliwatt × 1 × 10-12

Example: 1 mW × 1 × 10-12 = 1 × 10-12 GW

Reverse Conversion

To convert gigawatts back to milliwatts:

  • Remember, 1 gigawatt equals 1 × 1012 milliwatts.
  • To convert 1 × 10-12 GW to mW, multiply 1 × 10-12 x 1 × 1012, resulting in 1 mW.

Common Milliwatt to Gigawatt Conversions

Milliwatt to Gigawatt (Part 1)
Milliwatt to Gigawatt common conversions part 1
Milliwatt Gigawatt Actions
1 milliwatt 1 × 10-12 gigawatts
5 milliwatts 5 × 10-12 gigawatts
10 milliwatts 1 × 10-11 gigawatts
25 milliwatts 2.5 × 10-11 gigawatts
Milliwatt to Gigawatt (Part 2)
Milliwatt to Gigawatt common conversions part 2
Milliwatt Gigawatt Actions
50 milliwatts 5 × 10-11 gigawatts
100 milliwatts 1 × 10-10 gigawatts
500 milliwatts 5 × 10-10 gigawatts
1000 milliwatts 1 × 10-9 gigawatts

Milliwatts to gigawatts Conversion Table

Reference table with common milliwatts to gigawatts conversions. All values calculated with high precision.

Milliwatts to Gigawatts Table
10000 to 5 × 107

Milliwatts Gigawatts Actions
10000 mW 1 × 10-8 GW
25000 mW 2.5 × 10-8 GW
50000 mW 5 × 10-8 GW
100000 mW 1 × 10-7 GW
250000 mW 2.5 × 10-7 GW
500000 mW 5 × 10-7 GW
1000000 mW 1 × 10-6 GW
2500000 mW 2.5 × 10-6 GW
5000000 mW 5 × 10-6 GW
10000000 mW 1 × 10-5 GW
2.5 × 107 mW 2.5 × 10-5 GW
5 × 107 mW 5 × 10-5 GW

Milliwatts to Gigawatts Table
1 × 108 to 1 × 1013

Milliwatts Gigawatts Actions
1 × 108 mW 0.0001 GW
2.5 × 108 mW 0.00025 GW
5 × 108 mW 0.0005 GW
1 × 109 mW 0.001 GW
2.5 × 109 mW 0.0025 GW
5 × 109 mW 0.005 GW
1 × 1010 mW 0.01 GW
2.5 × 1010 mW 0.025 GW
5 × 1010 mW 0.05 GW
1 × 1011 mW 0.1 GW
2.5 × 1011 mW 14 GW
5 × 1011 mW 12 GW
1 × 1012 mW 1 GW
2.5 × 1012 mW 2 12 GW
5 × 1012 mW 5 GW
1 × 1013 mW 10 GW

Gigawatts to Milliwatts Table
0.0001 to 12

Gigawatts Milliwatts Actions
0.0001 GW 1 × 108 mW
0.00025 GW 2.5 × 108 mW
0.0005 GW 5 × 108 mW
0.001 GW 1 × 109 mW
0.0025 GW 2.5 × 109 mW
0.005 GW 5 × 109 mW
0.01 GW 1 × 1010 mW
0.025 GW 2.5 × 1010 mW
0.05 GW 5 × 1010 mW
0.1 GW 1 × 1011 mW
14 GW 2.5 × 1011 mW
12 GW 5 × 1011 mW

Gigawatts to Milliwatts Table
1 to 100000

Gigawatts Milliwatts Actions
1 GW 1 × 1012 mW
2 12 GW 2.5 × 1012 mW
5 GW 5 × 1012 mW
10 GW 1 × 1013 mW
25 GW 2.5 × 1013 mW
50 GW 5 × 1013 mW
100 GW 1 × 1014 mW
250 GW 2.5 × 1014 mW
500 GW 5 × 1014 mW
1000 GW 1 × 1015 mW
2500 GW 2.5 × 1015 mW
5000 GW 5 × 1015 mW
10000 GW 1 × 1016 mW
25000 GW 2.5 × 1016 mW
50000 GW 5 × 1016 mW
100000 GW 1 × 1017 mW

Definition of Milliwatt

Definition
SI multiple equal to one thousandth of a watt.
Exact factor
1 mW = 10⁻³ W
Sources
BIPM — SI Brochure

Definition of Gigawatt

Definition
SI multiple of the watt equal to one billion watts.
Exact factor
1 GW = 10⁹ W
Sources
BIPM — SI Brochure

Frequently Asked Questions

How many gigawatts are in one milliwatt?

One milliwatt equals 1 × 10-12 gigawatts. To convert, multiply the milliwatt value by 1 × 10-12. For the reverse, divide the gigawatt value by 1 × 10-12 (or multiply by 1 × 1012).

What is 1.21 milliwatts in gigawatts?

1.21 milliwatts = 1.21 × 10-12 gigawatts. This is one of the most commonly searched conversions for this pair.

How precise is the milliwatt-to-gigawatt conversion?

The factor 1 × 10-12 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.

Looking for the reverse? Convert Gigawatt to Milliwatt

Related Power Converters

Explore other power conversion tools:

Related in other categories:

Conversion factors verified against NIST, BIPM, ISO 80000-4 Based on SI base units (W = J/s, BIPM). Last reviewed: April 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.

Popular Power Conversions

Quick access to frequently searched power conversions:

1.21 mW→ GW