Watts to Terawatts Converter
Enter the power in watts below to convert it to terawatts.
Convert Watts to Terawatts
Enter a value in watts (W) to convert to terawatts (TW).
Watt to Terawatt Conversion Table
Table showing various watt measurements converted to terawatts. Click any preset value or arrow to load it into the converter.
| Watts (W) | Terawatts (TW) |
|---|---|
| 1 W | 1e-12 TW |
| 10 W | 1e-11 TW |
| 100 W | 1e-10 TW |
| 1,000 W | 1e-9 TW |
| 10,000 W | 0.00000001 TW |
| 100,000 W | 0.0000001 TW |
| 1,000,000 W | 0.000001 TW |
| 5,000,000 W | 0.000005 TW |
| 10,000,000 W | 0.00001 TW |
| 25,400,000 W | 0.0000254 TW |
How to Convert Watts to Terawatts
To convert watts to terawatts, multiply the power by the following conversion ratio: 1e-12 terawatts/watt.
Since one watt is equal to 1e-12 terawatts, you can use this simple formula to convert:
The power in terawatts is equal to the power in watts multiplied by 1e-12.
For example, here's how to convert 5 watts to terawatts using the formula above.
How Many Terawatts Are in a Watt?
There are 1e-12 terawatts in a watt, which is why we use this value in the formula above.
Our watt to terawatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Watts and terawatts are both units used to measure power. Keep reading to learn more about each unit.
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. [1]
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.
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). [2]
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.
When converting power between watts (W) and terawatts (TW), keep full floating-point precision (1 W = 1e-12 TW; 1 TW = 1e+12 W) during intermediate calculations and round only the final terawatt figure to match your instrument tolerance.
More Watt & Terawatt Conversions
Need to calculate in the opposite direction? Use our terawatts to watts calculator to switch your starting unit immediately. You can also explore related tools such as converting terawatts to watts, converting watts to horsepower (hp), or converting watts to kilowatts.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Watts (W) to Terawatts (TW)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Watt (W) & Terawatt (TW)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (W to TW)