Horsepower (Mech) to Kilojoule/Hour Converter

Power Converter

22 units available

Decimals:

From

To

2,684.519538

1 hp = 2,684.519538 kJ/h

Formula:

kJ/h = hp × 2,684.5195376962

With your value: 1 hp = 2,684.5195377 kJ/h

How big is that?

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

LED bulb (1/83 your value)0.0121 hp

Laptop (1/11 your value)0.0872 hp

Your value1.00 hp

Microwave oven (1.3× your value)1.34 hp

Electric kettle (4.0× your value)4.02 hp

Family car engine (1.2e+2× your value)121 hp

Other Horsepower (Mech) to Kilojoule/Hour conversions

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

Horsepower (Mech) to Kilojoule/Hour Conversion Table

Horsepower (Mech) (hp)	Kilojoule/Hour (kJ/h)
0.5	1,342.259769
1	2,684.519538
2	5,369.039075
5	13,422.597688
10	26,845.195377
15	40,267.793065
20	53,690.390754
25	67,112.988442
50	134,225.976885
100	268,451.95377
250	671,129.884424
500	1,342,259.768848
1000	2,684,519.537696

Kilojoule/Hour to Horsepower (Mech) Conversion Table

Kilojoule/Hour (kJ/h)	Horsepower (Mech) (hp)
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

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 (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

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

How to Convert Horsepower (Mech) to Kilojoule/Hour

To convert from Horsepower (Mech) (hp) to Kilojoule/Hour (kJ/h), multiply the value by 2,684.5195376962.

Formula: kJ/h = hp × 2,684.5195376962

Reverse: hp = kJ/h × 0.0003725061

Step-by-Step Example

Start with your value in Horsepower (Mech). For example: 5 hp
Multiply by the conversion factor: 5 x 2,684.5195376962
The result is: 13,422.597688 kJ/h

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.

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.

Frequently Asked Questions

How many Kilojoule/Hour are in 1 Horsepower (Mech)?

There are exactly 2,684.5195376962 Kilojoule/Hour in 1 Horsepower (Mech). This means the conversion factor from Horsepower (Mech) to Kilojoule/Hour is 2,684.5195376962.

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

The formula to convert Horsepower (Mech) to Kilojoule/Hour is: kJ/h = hp × 2,684.5195376962. For example, to convert 10 Horsepower (Mech) to Kilojoule/Hour, you would multiply 10 by 2,684.5195376962.

What is a Horsepower (Mech)?