How do you convert terawatts to watts?

To convert terawatts (TW) to watts (W), multiply the power in terawatts by 1.000000e+12 (watts = terawatts × 1.000000e+12).

What is 5 terawatts in watts?

5 terawatts (5 TW) is equal to 5.000000e+12 watts (5.000000e+12 W).

Which is larger, 1 terawatt (TW) or 1 watt (W)?

One terawatt (TW) is larger than one watt (W). Specifically, 1 TW contains 1.000000e+12 W, whereas 1 W is 1.000000e-12 TW.

How do I convert back from watts (W) to terawatts (TW)?

To reverse the calculation from W to TW, multiply your watt value by the inverse factor 1.000000e-12 (or divide by 1.000000e+12). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round TW to W results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 TW ≈ 5,000,000,000,000.00 W). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Terawatts to Watts Converter

Enter the power in terawatts below to convert it to watts.

Watts to Terawatts (W → TW)

Convert Terawatts to Watts

Enter a value in terawatts (TW) to convert to watts (W).

Value (TW)

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Result

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5e+12watts

5 TW = 5e+12 W

Result updates automatically

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Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))

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Terawatt to Watt Conversion Table

Table showing various terawatt measurements converted to watts. Click any preset value or arrow to load it into the converter.

Terawatts (TW)	Watts (W)
0.0000001 TW	100,000 W
0.0000002 TW	200,000 W
0.0000003 TW	300,000 W
0.0000004 TW	400,000 W
0.0000005 TW	500,000 W
0.0000006 TW	600,000 W
0.0000007 TW	700,000 W
0.0000008 TW	800,000 W
0.0000009 TW	900,000 W
0.00000001 TW	10,000 W

How to Convert Terawatts to Watts

To convert terawatts to watts, multiply the power by the following conversion ratio: 1e+12 watts/terawatt.

Since one terawatt is equal to 1e+12 watts, you can use this simple formula to convert:

watts = terawatts × 1e+12

The power in watts is equal to the power in terawatts multiplied by 1e+12.

For example, here's how to convert 5 terawatts to watts using the formula above.

watts = (5 TW × 1e+12) = 5e+12 W

How Many Watts Are in a Terawatt?

There are 1e+12 watts in a terawatt, which is why we use this value in the formula above.

1 TW = 1e+12 W|1 W = 1e-12 TW

Our terawatt to watt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Terawatts and watts are both units used to measure power. Keep reading to learn more about each unit.

What Is a Terawatt?

A terawatt is a unit of power equal to 1e+12 watts (W), the base unit for power. Equal to 10¹² Watts (1,000 GW). [1]

The terawatt is classified as an International System of Units (SI) unit of power. Terawatts can be abbreviated as TW; for example, 1 terawatt can be written as 1 TW.

In the metric system, "tera" is the standard SI prefix for trillions, or 10¹². This makes the terawatt (TW) a convenient decimal multiple of the watt (W).

In practice, terawatts (TW) are widely used across large-scale industrial, bulk, and macro-level power specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.

Learn more about terawatts in our Power Converter.

What Is a Watt?

Coherent SI unit of power equal to 1 Joule per second (1 J/s). It serves as a primary reference unit for measuring power across scientific and practical applications. [2]

The watt is classified as an International System of Units (SI) unit of power. Watts can be abbreviated as W; for example, 1 watt can be written as 1 W.

As the primary coherent reference unit for power in this category, all other power units are mathematically anchored to the watt (W).

In practice, watts (W) are widely used across standard power applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.

Learn more about watts in our Power Converter.

When converting power between terawatts (TW) and watts (W), keep full floating-point precision (1 TW = 1e+12 W; 1 W = 1e-12 TW) during intermediate calculations and round only the final watt figure to match your instrument tolerance.

More Terawatt & Watt Conversions

Need to calculate in the opposite direction? Use our watts to terawatts calculator to switch your starting unit immediately. You can also explore related tools such as converting watts to terawatts, converting horsepower (hp) to watts, or converting btu/hr to watts.

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Frequently Asked Questions

There are 1.000000e+12 watts (W) in 1 terawatt (TW). Conversely, 1 watt (W) is equal to 1.000000e-12 terawatts (TW).

Power Converter

Quick Info

Direct Factor: 1 terawatt (TW) equals 1.000000e+12 watts (W).
Inverse Factor: 1 watt (W) equals 1.000000e-12 terawatts (TW).
Formula: watts = terawatts × 1.000000e+12.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Terawatt (TW)

Equal to 10¹² Watts (1,000 GW).

Watt (W)

Coherent SI unit of power equal to 1 Joule per second (1 J/s).

Kilowatt (kW)

Equal to 1,000 Watts (1 kJ/s).

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Power & Radiant Flux)
Source
[2]NIST CUU · Derived SI Unit: Watt (W)
Source
[3]BIPM · SI Brochure (9th Ed.) — Power
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Terawatts (TW) to Watts (W)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Terawatt (TW) & Watt (W)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (TW to W)
BIPM Reference

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