Horsepower-Hour to Joule Converter

Energy Converter

27 units available

Decimals:

From

To

2,684,519.5377

1 hp·h = 2,684,519.5377 J

Formula:

J = hp·h × 2,684,519.5377

With your value: 1 hp·h = 2,684,519.5377 J

How big is that?

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

Heartbeat (1/2.7e+6 your value)3.73e-7 hp·h

AA battery charge (1/2.7e+2 your value)0.00373 hp·h

Slice of bread (1/9.6 your value)0.104 hp·h

Your value1.00 hp·h

Daily food intake (3.1× your value)3.13 hp·h

Litre of petrol (13× your value)12.7 hp·h

Other Horsepower-Hour to Joule conversions

2 hp·h to J 3 hp·h to J 4 hp·h to J 5 hp·h to J 6 hp·h to J 7 hp·h to J 8 hp·h to J

Horsepower-Hour to Joule Conversion Table

Horsepower-Hour (hp·h)	Joule (J)
0.5	1,342,259.76885
1	2,684,519.5377
2	5,369,039.0754
5	13,422,597.6885
10	26,845,195.377
15	40,267,793.0655
20	53,690,390.754
25	67,112,988.4425
50	134,225,976.885
100	268,451,953.77
250	671,129,884.425
500	1,342,259,768.85
1000	2,684,519,537.700001

Joule to Horsepower-Hour Conversion Table

Joule (J)	Horsepower-Hour (hp·h)
0.5	1.862531e-7
1	3.725061e-7
2	7.450123e-7
5	1.862531e-6
10	3.725061e-6
15	5.587592e-6
20	7.450123e-6
25	9.312653e-6
50	1.862531e-5
100	3.725061e-5
250	9.312653e-5
500	0.000186
1000	0.000373

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.

Horsepower-Hour (hp·h)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

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

Joule (J)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

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 Horsepower-Hour to Joule

To convert from Horsepower-Hour (hp·h) to Joule (J), multiply the value by 2,684,519.5377.

Formula: J = hp·h × 2,684,519.5377

Reverse: hp·h = J × 3.725061e-7

Step-by-Step Example

Start with your value in Horsepower-Hour. For example: 5 hp·h
Multiply by the conversion factor: 5 x 2,684,519.5377
The result is: 13,422,597.6885 J

About Horsepower-Hour

The horsepower-hour (hp·h) is a unit of energy and work. One horsepower-hour equals 2.684520 × 10^+6 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

About Joule

The joule is the SI unit of energy. One joule equals the work done when a force of one newton moves an object one meter.

Common uses: physics, electrical engineering, chemistry.

Frequently Asked Questions

How many Joule are in 1 Horsepower-Hour?

There are exactly 2,684,519.5377 Joule in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to Joule is 2,684,519.5377.

What is the formula to convert Horsepower-Hour to Joule?

The formula to convert Horsepower-Hour to Joule is: J = hp·h × 2,684,519.5377. For example, to convert 10 Horsepower-Hour to Joule, you would multiply 10 by 2,684,519.5377.

What is a Horsepower-Hour?