Kilojoule to Horsepower-Hour Converter

Energy Converter

27 units available

Decimals:

From

To

0.000373

1 kJ = 0.000373 hp·h

Formula:

hp·h = kJ × 0.0003725061

With your value: 1 kJ = 0.00037251 hp·h

How big is that?

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

Heartbeat (1/1.0e+3 your value)0.00100 kJ

Your value1.00 kJ

AA battery charge (10× your value)10.0 kJ

Slice of bread (2.8e+2× your value)280 kJ

Daily food intake (8.4e+3× your value)8.40e+3 kJ

Litre of petrol (3.4e+4× your value)3.42e+4 kJ

Other Kilojoule to Horsepower-Hour conversions

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

Kilojoule to Horsepower-Hour Conversion Table

Kilojoule (kJ)	Horsepower-Hour (hp·h)
0.5	0.000186
1	0.000373
2	0.000745
5	0.001863
10	0.003725
15	0.005588
20	0.00745
25	0.009313
50	0.018625
100	0.037251
250	0.093127
500	0.186253
1000	0.372506

Horsepower-Hour to Kilojoule Conversion Table

Horsepower-Hour (hp·h)	Kilojoule (kJ)
0.5	1,342.259769
1	2,684.519538
2	5,369.039075
5	13,422.597689
10	26,845.195377
15	40,267.793066
20	53,690.390754
25	67,112.988443
50	134,225.976885
100	268,451.95377
250	671,129.884425
500	1,342,259.76885
1000	2,684,519.5377

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.

Kilojoule (kJ)

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

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

How to Convert Kilojoule to Horsepower-Hour

To convert from Kilojoule (kJ) to Horsepower-Hour (hp·h), multiply the value by 0.0003725061.

Formula: hp·h = kJ × 0.0003725061

Reverse: kJ = hp·h × 2,684.5195377

Step-by-Step Example

Start with your value in Kilojoule. For example: 5 kJ
Multiply by the conversion factor: 5 x 0.0003725061
The result is: 0.001863 hp·h

About Kilojoule

The kilojoule (kJ) is a unit of energy and work. One kilojoule equals 1000 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 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.

Frequently Asked Questions

How many Horsepower-Hour are in 1 Kilojoule?

There are exactly 0.0003725061 Horsepower-Hour in 1 Kilojoule. This means the conversion factor from Kilojoule to Horsepower-Hour is 0.0003725061.

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

The formula to convert Kilojoule to Horsepower-Hour is: hp·h = kJ × 0.0003725061. For example, to convert 10 Kilojoule to Horsepower-Hour, you would multiply 10 by 0.0003725061.

What is a Kilojoule?