Horsepower to Terawatts Converter
Enter the power in horsepower below to convert it to terawatts.
Convert Horsepower (hp) to Terawatts
Enter a value in horsepower (hp) (hp) to convert to terawatts (TW).
Horsepower to Terawatt Conversion Table
Table showing various horsepower measurements converted to terawatts. Click any preset value or arrow to load it into the converter.
| Horsepower (hp) (hp) | Terawatts (TW) |
|---|---|
| 1 hp | 7.456999e-10 TW |
| 10 hp | 7.456999e-9 TW |
| 100 hp | 0.000000075 TW |
| 1,000 hp | 0.000000746 TW |
| 10,000 hp | 0.000007457 TW |
| 100,000 hp | 0.00007457 TW |
| 1,000,000 hp | 0.0007457 TW |
| 5,000,000 hp | 0.0037285 TW |
| 10,000,000 hp | 0.007457 TW |
| 25,400,000 hp | 0.0189408 TW |
How to Convert Horsepower to Terawatts
To convert horsepower to terawatts, multiply the power by the following conversion ratio: 7.456999e-10 terawatts/horsepower.
Since one horsepower is equal to 7.456999e-10 terawatts, you can use this simple formula to convert:
The power in terawatts is equal to the power in horsepower multiplied by 7.456999e-10.
For example, here's how to convert 5 horsepower to terawatts using the formula above.
How Many Terawatts Are in a Horsepower?
There are 7.456999e-10 terawatts in a horsepower, which is why we use this value in the formula above.
Our horsepower to terawatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Horsepower and terawatts are both units used to measure power. Keep reading to learn more about each unit.
What Is a Horsepower?
A horsepower is a unit of power equal to 745.6998716 watts (W), the base unit for power. Imperial mechanical horsepower (550 ft·lbf/s ≈ 745.7 W). [1]
The horsepower is classified as a US customary and imperial unit of power. Horsepower can be abbreviated as hp; for example, 1 horsepower can be written as 1 hp.
When working with horsepower (hp) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, horsepower (hp) are widely used across standard power applications within US customary and imperial 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 horsepower (hp) and terawatts (TW), keep full floating-point precision (1 hp = 7.456999e-10 TW; 1 TW = 1,341,022,089.5950284 hp) during intermediate calculations and round only the final terawatt figure to match your instrument tolerance.
More Horsepower & Terawatt Conversions
Need to calculate in the opposite direction? Use our terawatts to horsepower (hp) calculator to switch your starting unit immediately. You can also explore related tools such as converting terawatts to horsepower (hp), converting horsepower (hp) to watts, or converting horsepower (hp) to kilowatts.
Convert from Horsepower
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Horsepower (hp) (hp) to Terawatts (TW)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Horsepower (Mechanical) (hp) & Terawatt (TW)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (hp to TW)