Convert Terawatts to Gigawatts

Terawatts

Accepts decimals and fractions, like 1.5 or 1 1/2.

Quick presets:

Keyboard shortcut: press S to swap units.

Gigawatts

Round to 2 decimals

Contextual examples

1 Terawatts = 1,000 Gigawatts
10 Terawatts = 10,000 Gigawatts
100 Terawatts = 100,000 Gigawatts
1000 Terawatts = 1,000,000 Gigawatts

Gigawatts to Terawatts

Swap

How many gigawatts in a terawatts?

In 1 terawatts there are 1,000 gigawatts. Meanwhile in 1 gigawatts there are 0.001 terawatts. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Terawatts to Gigawatts calculator above to convert any number.

* Values rounded for readability — use the calculator above for full precision

Related calculators

Use these next if you want similar conversions or tools.

Gigawatts to Terawatts Terawatts to Watts Watts to Gigawatts Terawatts to Kilowatts Kilowatts to Gigawatts Terawatts to Megawatts Megawatts to Gigawatts Terawatts to Petawatts

How does this converter work?

The Calculate Box tool to convert terawatts to gigawatts uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a terawatts value in the box and have it instantly converted to gigawatts.

Back to All Calculators

Convert Terawatts to Gigawatts

Convert terawatts (TW) to gigawatts (GW) in seconds with this simple calculator. Enter a value in TW to get an instant GW result for power and energy work.

Terawatts

Accepts decimals and fractions, like 1.5 or 1 1/2.

Quick presets:

Keyboard shortcut: press S to swap units.

Gigawatts

Round to 2 decimals

Contextual examples

1 Terawatts = 1,000 Gigawatts
10 Terawatts = 10,000 Gigawatts
100 Terawatts = 100,000 Gigawatts
1000 Terawatts = 1,000,000 Gigawatts

Gigawatts to Terawatts

Swap

How many gigawatts in a terawatts?

* Values rounded for readability — use the calculator above for full precision

How to convert terawatts to gigawatts?

To convert terawatts (TW) to gigawatts (GW), use the metric prefix scale. Tera- means (10^{12}) watts and giga- means (10^{9}) watts. That makes 1 TW = 1,000 GW.

Conversion formula:

GW = TW × 1,000

Quick examples:

0.5 TW = 0.5 × 1,000 = 500 GW
3 TW = 3 × 1,000 = 3,000 GW

This TW to GW conversion is common in power and energy reporting, since terawatts make very large totals easier to read than long gigawatt numbers.

Frequently asked questions

How many gigawatts are in 1 terawatt?

1 terawatt (TW) equals 1,000 gigawatts (GW). This is because “tera” means 10¹² and “giga” means 10⁹, so the difference is a factor of 1,000.

How do you convert terawatts to gigawatts?

Multiply the terawatt value by 1,000.
Example: 2.5 TW × 1,000 = 2,500 GW.

What is the formula for TW to GW conversion?

Use this simple formula:
GW = TW × 1,000

How do you convert gigawatts to terawatts?

Divide the gigawatt value by 1,000.
Example: 750 GW ÷ 1,000 = 0.75 TW.

What is the formula for GW to TW conversion?

Use this formula:
TW = GW ÷ 1,000

Why is 1 terawatt equal to 1,000 gigawatts?

The metric prefixes set the scale. A terawatt is 10¹² watts, and a gigawatt is 10⁹ watts. Since 10¹² ÷ 10⁹ = 10³, the result is 1,000.

Are terawatts and gigawatts units of power or energy?

Terawatts and gigawatts measure power, not energy. Power is the rate of using or making energy. Energy is measured in watt-hours, like GWh or TWh.

What’s the difference between GW and GWh (or TW and TWh)?

GW or TW tells you power at a moment in time.
GWh or TWh tells you total energy over time.
Example: 1 GW running for 3 hours produces 3 GWh.

Can terawatts and gigawatts be used for electricity and other power types?

Yes. TW and GW can describe any type of power output or use, such as electric power, heat power, or mechanical power. The unit stays the same; only the source changes.

Is the TW to GW conversion ever different?

No. The conversion between terawatts and gigawatts is fixed in the metric system. It doesn’t change based on context, country, or industry.

What are common examples where terawatts and gigawatts are used?

Gigawatts often describe power plants, grids, and large wind or solar farms. Terawatts often describe very large totals, like national demand or global electricity use.

What’s a quick mental math trick for converting TW to GW?

Move the decimal three places to the right (or add three zeros).

0.6 TW = 600 GW
12 TW = 12,000 GW

Related calculators

Use these next if you want similar conversions or tools.

Gigawatts to Terawatts Terawatts to Watts Watts to Gigawatts Terawatts to Kilowatts Kilowatts to Gigawatts Terawatts to Megawatts Megawatts to Gigawatts Terawatts to Petawatts