Gigawatts to Horsepower Converter
Enter the power in gigawatts below to convert it to horsepower.
Convert Gigawatts to Horsepower (hp)
Enter a value in gigawatts (GW) to convert to horsepower (hp) (hp).
Gigawatt to Horsepower Conversion Table
Table showing various gigawatt measurements converted to horsepower. Click any preset value or arrow to load it into the converter.
| Gigawatts (GW) | Horsepower (hp) (hp) |
|---|---|
| 0.0000001 GW | 0.1341022 hp |
| 0.0000002 GW | 0.2682044 hp |
| 0.0000003 GW | 0.4023066 hp |
| 0.0000004 GW | 0.5364088 hp |
| 0.0000005 GW | 0.670511 hp |
| 0.0000006 GW | 0.8046133 hp |
| 0.0000007 GW | 0.9387155 hp |
| 0.0000008 GW | 1.0728177 hp |
| 0.0000009 GW | 1.2069199 hp |
| 0.00000001 GW | 0.0134102 hp |
How to Convert Gigawatts to Horsepower
To convert gigawatts to horsepower, multiply the power by the following conversion ratio: 1,341,022.089595 horsepower/gigawatt.
Since one gigawatt is equal to 1,341,022.089595 horsepower, you can use this simple formula to convert:
The power in horsepower is equal to the power in gigawatts multiplied by 1,341,022.089595.
For example, here's how to convert 5 gigawatts to horsepower using the formula above.
How Many Horsepower Are in a Gigawatt?
There are 1,341,022.089595 horsepower in a gigawatt, which is why we use this value in the formula above.
Our gigawatt to horsepower calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Gigawatts and horsepower are both units used to measure power. Keep reading to learn more about each unit.
What Is a Gigawatt?
A gigawatt is a unit of power equal to 1,000,000,000 watts (W), the base unit for power. Equal to 1,000,000,000 Watts (1,000 MW). [1]
The gigawatt is classified as an International System of Units (SI) unit of power. Gigawatts can be abbreviated as GW; for example, 1 gigawatt can be written as 1 GW.
In the metric system, "giga" is the standard SI prefix for billions, or 10⁹. This makes the gigawatt (GW) a convenient decimal multiple of the watt (W).
In practice, gigawatts (GW) 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.
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). [2]
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.
When converting power between gigawatts (GW) and horsepower (hp), keep full floating-point precision (1 GW = 1,341,022.089595 hp; 1 hp = 0.000000746 GW) during intermediate calculations and round only the final horsepower figure to match your instrument tolerance.
More Gigawatt & Horsepower Conversions
Need to calculate in the opposite direction? Use our horsepower (hp) to gigawatts calculator to switch your starting unit immediately. You can also explore related tools such as converting horsepower (hp) to gigawatts, converting watts to horsepower (hp), or converting kilowatts to horsepower (hp).
Convert from Gigawatts
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Gigawatts (GW) to Horsepower (hp) (hp)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Gigawatt (GW) & Horsepower (Mechanical) (hp)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (GW to hp)