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Gigawatt-hour [GWh] to Milliwatt-hour [mWh] Converter

Quick Reference

1 Gigawatt-hour (GWh) = 1.0000e+12 Milliwatt-hour (mWh)

1 Milliwatt-hour (mWh) = 1.0000e-12 Gigawatt-hour (GWh)

How to Convert Gigawatt-hour to Milliwatt-hour

1 GWh = 1.0000e+12 mWh
1 mWh = 1.0000e-12 GWh

To convert Gigawatt-hour to Milliwatt-hour, multiply the value by 1.0000e+12. To convert Milliwatt-hour back to Gigawatt-hour, divide by 1.0000e+12.

Example: convert 10 GWh to mWh:
10 GWh = 10 x 1.0000e+12 = 1.0000e+13 mWh

↔ Convert Milliwatt-hour to Gigawatt-hour

Gigawatt-hour

Definition: A gigawatt-hour (symbol GWh) is a unit of energy equal to one gigawatt (1,000,000,000 watts) of power sustained for one hour. It represents a very large amount of energy.

History/origin: The gigawatt-hour is a derivative of the watt-hour, using the SI prefix 'giga-' to denote a factor of one billion. It became relevant with the development of very large-scale power generation facilities.

Current use: Gigawatt-hours are used to measure the energy output of entire power grids, the energy consumption of large countries or regions, and the total energy production of large renewable energy projects.

Milliwatt-hour

Definition: A milliwatt-hour (symbol mWh) is a unit of energy equal to one-thousandth of a watt-hour. It represents a very small amount of energy.

History/origin: The milliwatt-hour is a derivative of the watt-hour, using the SI prefix 'milli-' to denote a factor of one-thousandth.

Current use: Milliwatt-hours are used in applications involving low-power electronics, such as sensors, small batteries, and medical devices.

Gigawatt-hour to Milliwatt-hour Conversion Table

Gigawatt-hour [GWh]Milliwatt-hour [mWh]
1 GWh1.0000e+12 mWh
2 GWh2.0000e+12 mWh
5 GWh5.0000e+12 mWh
10 GWh1.0000e+13 mWh
20 GWh2.0000e+13 mWh
50 GWh5.0000e+13 mWh
100 GWh1.0000e+14 mWh
200 GWh2.0000e+14 mWh
500 GWh5.0000e+14 mWh
1000 GWh1.0000e+15 mWh

Common Gigawatt-hour to Milliwatt-hour conversions

  • 1 GWh = 1,000,000,000,000 mWh
  • 2 GWh = 2,000,000,000,000 mWh
  • 3 GWh = 3,000,000,000,000 mWh
  • 4 GWh = 4,000,000,000,000 mWh
  • 5 GWh = 5,000,000,000,000 mWh
  • 6 GWh = 6,000,000,000,000 mWh
  • 7 GWh = 7,000,000,000,000 mWh
  • 8 GWh = 8,000,000,000,000 mWh
  • 9 GWh = 9,000,000,000,000 mWh
  • 10 GWh = 10,000,000,000,000 mWh
  • 12 GWh = 12,000,000,000,000 mWh
  • 15 GWh = 15,000,000,000,000 mWh
  • 20 GWh = 20,000,000,000,000 mWh
  • 25 GWh = 25,000,000,000,000 mWh
  • 30 GWh = 30,000,000,000,000 mWh
  • 40 GWh = 40,000,000,000,000 mWh
  • 50 GWh = 50,000,000,000,000 mWh
  • 60 GWh = 60,000,000,000,000 mWh
  • 75 GWh = 75,000,000,000,000 mWh
  • 100 GWh = 100,000,000,000,000 mWh
  • 150 GWh = 150,000,000,000,000 mWh
  • 200 GWh = 200,000,000,000,000 mWh
  • 250 GWh = 250,000,000,000,000 mWh
  • 300 GWh = 300,000,000,000,000 mWh
  • 500 GWh = 500,000,000,000,000 mWh
  • 750 GWh = 750,000,000,000,000 mWh
  • 1,000 GWh = 1.000000e+15 mWh

Common pairs of Energy

Gigawatt-hour [GWh] to Milliwatt-hour [mWh] Converter

What is 1 GWh in mWh?
1 Gigawatt-hour (GWh) equals 1,000,000,000,000 mWh, and 1 mWh equals 1.000000e-12 GWh.
How do I convert Gigawatt-hour to Milliwatt-hour?
Multiply by 1,000,000,000,000: 10 GWh × 1,000,000,000,000 = 10,000,000,000,000 mWh. The converter above does it for any value, with the precision you choose.
What is 100 GWh in mWh?
100 GWh = 100,000,000,000,000 mWh. Common amounts are listed on this page, each with its own step-by-step page.
Is a Gigawatt-hour bigger than a Milliwatt-hour?
Yes. 1 GWh = 1,000,000,000,000 mWh, so the same quantity becomes a larger number when written in mWh.
Gigawatt-hour to Milliwatt-hour Converter | UtilLab