A Gigawatt (GW) equals 1e+9 watt(s), a scaled unit of electrical power used for giga-scale electrical work.
Gigawatts to Milliwatts
Convert Gigawatt (GW) to Milliwatt (mW) instantly with an exact formula, conversion table, and FAQ.
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Convert gigawatts (GW) to milliwatts (mW) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
mW = GW × 1.000000e+12
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Formula
mW = GW × 1.000000e+12
GW = mW × 1.000000e-12
Conversion table
| 1 GW | 1.000000e+12 mW |
| 5 GW | 5.000000e+12 mW |
| 10 GW | 1.000000e+13 mW |
| 20 GW | 2.000000e+13 mW |
| 50 GW | 5.000000e+13 mW |
| 100 GW | 1.000000e+14 mW |
| 500 GW | 5.000000e+14 mW |
| 1000 GW | 1.000000e+15 mW |
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How the formula works
Both gigawatt and milliwatt measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in gigawatts by 1.000000e+12 to get milliwatts. To reverse the conversion, multiply a milliwatt value by 1.000000e-12 to get back to gigawatts.
Frequently asked questions
What is Gigawatt (GW)?
A Gigawatt (GW) equals 1e+9 watt(s), a scaled unit of electrical power used for giga-scale electrical work.
What is Milliwatt (mW)?
A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
How do I convert gigawatts to milliwatts?
Multiply the gigawatt value by 1.000000e+12 to get the equivalent in milliwatts. For example, 5 GW × 1.000000e+12 = 5.000000e+12 mW.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1.000000e+12 is an exact, non-rounded value.
Can I convert milliwatts back to gigawatts?
Yes. Divide the milliwatt value by 1.000000e+12, or multiply it by 1.000000e-12, to get gigawatts.
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About converting gigawatts to milliwatts
A Gigawatt (GW) equals 1e+9 watt(s), a scaled unit of electrical power used for giga-scale electrical work. A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
Use this calculator to move between gigawatts and milliwatts accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.