Horsepower to Gigawatts Converter
Enter the power in horsepower below to convert it to gigawatts.
Convert Horsepower (hp) to Gigawatts
Enter a value in horsepower (hp) (hp) to convert to gigawatts (GW).
Horsepower to Gigawatt Conversion Table
Table showing various horsepower measurements converted to gigawatts. Click any preset value or arrow to load it into the converter.
| Horsepower (hp) (hp) | Gigawatts (GW) |
|---|---|
| 1 hp | 0.000000746 GW |
| 10 hp | 0.000007457 GW |
| 100 hp | 0.00007457 GW |
| 1,000 hp | 0.0007457 GW |
| 10,000 hp | 0.007457 GW |
| 100,000 hp | 0.07457 GW |
| 1,000,000 hp | 0.7456999 GW |
| 5,000,000 hp | 3.7284994 GW |
| 10,000,000 hp | 7.4569987 GW |
| 25,400,000 hp | 18.9407767 GW |
How to Convert Horsepower to Gigawatts
To convert horsepower to gigawatts, multiply the power by the following conversion ratio: 0.000000746 gigawatts/horsepower.
Since one horsepower is equal to 0.000000746 gigawatts, you can use this simple formula to convert:
The power in gigawatts is equal to the power in horsepower multiplied by 0.000000746.
For example, here's how to convert 5 horsepower to gigawatts using the formula above.
How Many Gigawatts Are in a Horsepower?
There are 0.000000746 gigawatts in a horsepower, which is why we use this value in the formula above.
Our horsepower to gigawatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Horsepower and gigawatts 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 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). [2]
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.
When converting power between horsepower (hp) and gigawatts (GW), keep full floating-point precision (1 hp = 0.000000746 GW; 1 GW = 1,341,022.089595 hp) during intermediate calculations and round only the final gigawatt figure to match your instrument tolerance.
More Horsepower & Gigawatt Conversions
Need to calculate in the opposite direction? Use our gigawatts to horsepower (hp) calculator to switch your starting unit immediately. You can also explore related tools such as converting gigawatts 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 Gigawatts (GW)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Horsepower (Mechanical) (hp) & Gigawatt (GW)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (hp to GW)