Kilojoule/Hour to Horsepower (Boiler) Converter

Power Converter

22 units available

Decimals:

From

To

2.831722e-5

1 kJ/h = 2.831722e-5 hp (S)

Formula:

hp (S) = kJ/h × 0.0000283172

With your value: 1 kJ/h = 2.831722e-5 hp (S)

How big is that?

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

Your value1.00 kJ/h

LED bulb (32× your value)32.4 kJ/h

Laptop (2.3e+2× your value)234 kJ/h

Microwave oven (3.6e+3× your value)3.60e+3 kJ/h

Electric kettle (1.1e+4× your value)1.08e+4 kJ/h

Family car engine (3.2e+5× your value)3.24e+5 kJ/h

Other Kilojoule/Hour to Horsepower (Boiler) conversions

2 kJ/h to hp (S)3 kJ/h to hp (S)4 kJ/h to hp (S)5 kJ/h to hp (S)6 kJ/h to hp (S)7 kJ/h to hp (S)8 kJ/h to hp (S)

Kilojoule/Hour to Horsepower (Boiler) Conversion Table

Kilojoule/Hour (kJ/h)	Horsepower (Boiler) (hp (S))
0.5	1.415861e-5
1	2.831722e-5
2	5.663444e-5
5	0.000142
10	0.000283
15	0.000425
20	0.000566
25	0.000708
50	0.001416
100	0.002832
250	0.007079
500	0.014159
1000	0.028317

Horsepower (Boiler) to Kilojoule/Hour Conversion Table

Horsepower (Boiler) (hp (S))	Kilojoule/Hour (kJ/h)
0.5	17,657.1
1	35,314.2
2	70,628.4
5	176,571
10	353,142
15	529,713
20	706,284
25	882,855
50	1,765,710
100	3,531,420
250	8,828,550
500	17,657,100
1000	35,314,200

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/Hour (kJ/h)

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 (Boiler) (hp (S))

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

How to Convert Kilojoule/Hour to Horsepower (Boiler)

To convert from Kilojoule/Hour (kJ/h) to Horsepower (Boiler) (hp (S)), multiply the value by 2.831722e-5.

Formula: hp (S) = kJ/h × 0.0000283172

Reverse: kJ/h = hp (S) × 35,314.2

Step-by-Step Example

Start with your value in Kilojoule/Hour. For example: 5 kJ/h
Multiply by the conversion factor: 5 x 2.831722e-5
The result is: 0.000142 hp (S)

About Kilojoule/Hour

The kilojoule/hour (kJ/h) is a unit of power. One kilojoule/hour equals 0.2777777778 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 (Boiler)

The horsepower (boiler) (hp (S)) is a unit of power. One horsepower (boiler) equals 9809.5 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 (Boiler) are in 1 Kilojoule/Hour?

There are exactly 2.831722e-5 Horsepower (Boiler) in 1 Kilojoule/Hour. This means the conversion factor from Kilojoule/Hour to Horsepower (Boiler) is 2.831722e-5.

What is the formula to convert Kilojoule/Hour to Horsepower (Boiler)?

The formula to convert Kilojoule/Hour to Horsepower (Boiler) is: hp (S) = kJ/h × 0.0000283172. For example, to convert 10 Kilojoule/Hour to Horsepower (Boiler), you would multiply 10 by 2.831722e-5.

What is a Kilojoule/Hour?