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Terawatt to Gigawatt Converter

Enter the value that you want to convert terawatt (TW) to gigawatt (GW) or gigawatt to terawatt.Also written as TW to GW conversion.

1 terawatt = 1000.0000000 gigawatt

Formula: gigawatt = terawatt value × 1000.0000000

TW to GW — terawatt to gigawatt

TW
10000.00000GW

10 terawatt = 10000.00000 gigawatt

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Why Convert Terawatt to Gigawatt?

The Terawatt in Engineering

Terawatt (TW) is a unit of power measurement. 1 terawatt is equal to 1000.0000000 gigawatt.

About the Gigawatt

Gigawatt (GW) is a unit of power measurement. 1 gigawatt is equal to 0.0010000 terawatt.

Power Measurement Across Applications

Power units span from milliwatts in electronics to megawatts in power plants. Engine output is still quoted in horsepower (mechanical, metric, and electrical — all slightly different). HVAC systems rate cooling in tons of refrigeration or BTU/hour. Solar panels specify watts peak. Electric motors list watts or kilowatts. Each industry carries its historical unit preferences, making conversion between them a daily necessity.

terawatt to gigawatt metric conversion table

0.01 TW=10.00000 GW
0.1 TW=100.00000 GW
1 TW=1000.00000 GW
2 TW=2000.00000 GW
3 TW=3000.00000 GW
4 TW=4000.00000 GW
5 TW=5000.00000 GW
6 TW=6000.00000 GW
7 TW=7000.00000 GW
8 TW=8000.00000 GW
9 TW=9000.00000 GW
10 TW=10000.00000 GW
11 TW=11000.00000 GW
12 TW=12000.00000 GW
13 TW=13000.00000 GW
14 TW=14000.00000 GW
15 TW=15000.00000 GW
16 TW=16000.00000 GW
17 TW=17000.00000 GW
18 TW=18000.00000 GW
19 TW=19000.00000 GW
20 TW=20000.00000 GW
30 TW=30000.00000 GW
40 TW=40000.00000 GW
50 TW=50000.00000 GW
60 TW=60000.00000 GW
70 TW=70000.00000 GW
80 TW=80000.00000 GW
90 TW=90000.00000 GW
100 TW=100000.00000 GW
200 TW=200000.00000 GW
300 TW=300000.00000 GW
400 TW=400000.00000 GW
500 TW=500000.00000 GW
600 TW=600000.00000 GW
700 TW=700000.00000 GW
800 TW=800000.00000 GW
900 TW=900000.00000 GW
1000 TW=1000000.00000 GW

How to Convert TW to GW (Terawatt to Gigawatt)?

We can convert terawatt to gigawatt by using an example.

Example:

Convert 20 Terawatt to Gigawatt?

We know 1 Terawatt = 1000.0000000 gigawatt; 1 Gigawatt = 0.0010000 terawatt.

20 terawatt = ___GW

20 × 1000.0000000 = 20000.00000 GW (we know 1 terawatt = 1000.0000000 gigawatt)

Answer:

20 terawatt = 20000.00000 gigawatt

Terawatts to Gigawatts: Global Energy and Civilization Scale

The terawatt (TW) is the unit for planetary-scale power flows. Total human civilization currently consumes about 18 TW. Solar radiation hitting Earth averages 174,000 TW. One terawatt equals 1,000 gigawatts. This conversion is used in climate science, global energy policy, and discussions about humanity's total energy footprint.

  1. Start with the power value in terawatts (TW).
  2. Multiply by 1,000 to get gigawatts.
  3. The result is power in gigawatts (GW).
  4. Example: 2.5 TW × 1,000 = 2,500 GW.
💡 Tip: To contextualize: humanity uses ~18 TW (18,000 GW). The Sun delivers 174,000 TW to Earth. Capturing just 0.01% of incoming solar radiation (17.4 TW) could nearly power all civilization.

TW to GW: Planetary Energy Scale

Global power flows and capacities expressed in both units:

TerawattGigawatt
0.1 TW100 GW
0.5 TW500 GW
1 TW1,000 GW
3 TW3,000 GW
18 TW18,000 GW
44 TW44,000 GW
174,000 TW174,000,000 GW

Worked Examples: TW to GW

Question 1: Global renewable energy capacity reached 3.4 TW in 2023. Express in GW.

Solution:

GW = TW × 1,000

= 3.4 × 1,000

= 3,400 GW

Answer: 3.4 TW = 3,400 GW of global renewable capacity.

Question 2: The United States electricity generation capacity is about 1.2 TW. Convert to GW.

Solution:

GW = TW × 1,000

= 1.2 × 1,000

= 1,200 GW

Answer: 1.2 TW = 1,200 GW of US generation capacity.

Question 3: World primary energy consumption is approximately 18.5 TW. What is that in GW?

Solution:

GW = TW × 1,000

= 18.5 × 1,000

= 18,500 GW

Answer: 18.5 TW = 18,500 GW — all of human energy consumption.

Practice: TW to GW

Try solving these on your own to test your understanding:

  1. Convert 0.5 TW to GW. (Answer: 500 GW)
  2. Global solar capacity is about 1.4 TW. Express in GW. (Answer: 1,400 GW)
  3. Convert 2 TW to GW. (Answer: 2,000 GW)
  4. Earth reflects 50 TW of solar radiation. What is that in GW? (Answer: 50,000 GW)
  5. India's generation capacity is 0.4 TW. Convert to GW. (Answer: 400 GW)

The Kardashev Scale and Terawatts

Physicist Nikolai Kardashev proposed classifying civilizations by energy use. A Type I civilization harnesses all energy reaching its planet (~174,000 TW from the Sun). Humanity at 18 TW is about Type 0.73 on this scale. Reaching Type I requires capturing ~10,000× more energy. The terawatt is the natural unit for discussing these civilizational milestones.

Climate Science and TW

Earth's energy balance is measured in TW: incoming solar ≈ 174,000 TW, reflected ≈ 50,000 TW, absorbed ≈ 124,000 TW, radiated back to space ≈ 124,000 TW (in equilibrium). The greenhouse effect traps an extra ~2-3 W/m² globally, which over Earth's surface (510 trillion m²) equals about 1,000 TW of energy imbalance driving climate change.

Key Takeaways

  • 1 TW = 1,000 GW exactly.
  • Multiply TW by 1,000 to get gigawatts.
  • Total human civilization uses approximately 18 TW.
  • Used in global energy policy, climate science, and astrophysics.
  • The Sun delivers 174,000 TW to Earth — vastly more than we use.

Terawatt to Gigawatt Conversion Formula

gigawatt = terawatt × 1000.0000000

1 terawatt = 1000.0000000 gigawatt

1 gigawatt = 0.0010000 terawatt

Reverse: terawatt = gigawatt × 0.0010000

Frequently Asked Questions

How many gigawatt are in 1 terawatt?

There are 1000.0000000 gigawatt in 1 terawatt. To convert terawatt to gigawatt, multiply the value by 1000.0000000.

How do I convert terawatt to gigawatt?

Multiply your terawatt value by 1000.0000000 to get the equivalent in gigawatt. For example, 5 terawatt = 5 × 1000.0000000 = 5000.00000 gigawatt.

How do I convert gigawatt to terawatt?

Multiply your gigawatt value by 0.0010000 to get the equivalent in terawatt. Alternatively, divide by 1000.0000000.

What is 10 terawatt in gigawatt?

10 terawatt is equal to 10000.00000 gigawatt.

What is 100 terawatt in gigawatt?

100 terawatt is equal to 100000.00000 gigawatt.