Gigawatt to Horsepower (Mech) Converter

Power Converter

22 units available

Decimals:

From

To

1,341,022.089595

1 GW = 1,341,022.089595 hp

Formula:

hp = GW × 1,341,022.0895950282

With your value: 1 GW = 1,341,022.08959503 hp

How big is that?

Everyday references on a logarithmic scale, all expressed in gigawatt so you can sanity-check the result.

LED bulb (1/1.1e+8 your value)9.00e-9 GW

Laptop (1/1.5e+7 your value)6.50e-8 GW

Microwave oven (1/1.0e+6 your value)0.00000100 GW

Electric kettle (1/3.3e+5 your value)0.00000300 GW

Family car engine (1/1.1e+4 your value)0.0000900 GW

Your value1.00 GW

Other Gigawatt to Horsepower (Mech) conversions

2 GW to hp 3 GW to hp 4 GW to hp 5 GW to hp 6 GW to hp 7 GW to hp 8 GW to hp

Gigawatt to Horsepower (Mech) Conversion Table

Gigawatt (GW)	Horsepower (Mech) (hp)
0.5	670,511.044798
1	1,341,022.089595
2	2,682,044.17919
5	6,705,110.447975
10	13,410,220.89595
15	20,115,331.343925
20	26,820,441.791901
25	33,525,552.239876
50	67,051,104.479751
100	134,102,208.959503
250	335,255,522.398757
500	670,511,044.797514
1000	1,341,022,089.595029

Horsepower (Mech) to Gigawatt Conversion Table

Horsepower (Mech) (hp)	Gigawatt (GW)
0.5	3.728499e-7
1	7.456999e-7
2	1.491400e-6
5	3.728499e-6
10	7.456999e-6
15	1.118550e-5
20	1.491400e-5
25	1.864250e-5
50	3.728499e-5
100	7.456999e-5
250	0.000186
500	0.000373
1000	0.000746

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Gigawatt (GW)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Horsepower (Mech) (hp)

Power

Exact conversion

Mechanical horsepower is exactly 550 ft·lbf/s = 745.699 871 582 270 22 W.

Metric horsepower (PS) is 735.498 75 W — about 1.4 % lower.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Gigawatt to Horsepower (Mech)

To convert from Gigawatt (GW) to Horsepower (Mech) (hp), multiply the value by 1,341,022.0895950282.

Formula: hp = GW × 1,341,022.0895950282

Reverse: GW = hp × 7.456999e-7

Step-by-Step Example

Start with your value in Gigawatt. For example: 5 GW
Multiply by the conversion factor: 5 x 1,341,022.0895950282
The result is: 6,705,110.447975 hp

About Gigawatt

The gigawatt (GW) is a unit of power. One gigawatt equals 1.000000 × 10^+9 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

About Horsepower (Mech)

The horsepower (mech) (hp) is a unit of power. One horsepower (mech) equals 745.6998716 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

Frequently Asked Questions

How many Horsepower (Mech) are in 1 Gigawatt?

There are exactly 1,341,022.0895950282 Horsepower (Mech) in 1 Gigawatt. This means the conversion factor from Gigawatt to Horsepower (Mech) is 1,341,022.0895950282.

What is the formula to convert Gigawatt to Horsepower (Mech)?

The formula to convert Gigawatt to Horsepower (Mech) is: hp = GW × 1,341,022.0895950282. For example, to convert 10 Gigawatt to Horsepower (Mech), you would multiply 10 by 1,341,022.0895950282.

What is a Gigawatt?