Horsepower-Hour to Kilojoule Converter
Quick answer
To convert Horsepower-Hours to Kilojoules, multiply by 2,684.5195377 (or divide by 0.0003725061). Therefore, 1 Horsepower-Hour (hp·h) equals 2,684.5195377 Kilojoules (kJ).
Formula: kJ = hp·h × 2,684.5195377. Worked example: 10 hp·h = 26,845.195377 kJ.
Convert Horsepower-Hour (hp·h) to Kilojoule (kJ) online with our free unit converter. In energy, 1 hp·h = 2,684.519538 kJ. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Horsepower-Hour to Kilojoule
- Step 1 — start with the formula. kJ = hp·h × 2,684.5195377
- Step 2 — substitute your figure. 10 hp·h × 2,684.5195377
- Step 3 — read the result. 10 hp·h = 26,845.195377 kJ
- Step 4 — check it in reverse. hp·h = kJ × 0.0003725061 returns Invalid hp·h, which matches the figure you started with.
Energy Converter
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1 hp·h = 2,684.519538 kJ
Formula:
kJ = hp·h × 2,684.5195377With your value: 1 hp·h = 2,684.5195377 kJ
How big is that?
Everyday references on a logarithmic scale, all expressed in horsepower-hour so you can sanity-check the result.
Other Horsepower-Hour to Kilojoule conversions
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 |
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 |
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
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
Kilojoule (kJ)
Energy
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 Kilojoule
To convert from Horsepower-Hour (hp·h) to Kilojoule (kJ), multiply the value by 2,684.5195377.
Formula: kJ = hp·h × 2,684.5195377
Reverse: hp·h = kJ × 0.0003725061
Step-by-Step Example
- Start with your value in Horsepower-Hour. For example: 5 hp·h
- Multiply by the conversion factor: 5 x 2,684.5195377
- The result is: 13,422.597689 kJ
Horsepower-Hour and Kilojoule Relationship
This calculation facilitates standardized conversion between recognized units of energy. Since 1 Horsepower-Hour equals approximately 2,684.5195 Kilojoules, the Horsepower-Hour represents a larger unit interval than the Kilojoule. Understanding the relationship between Horsepower-Hour and Kilojoule is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Horsepower-Hour
The Horsepower-Hour (symbol: hp·h) is a recognized unit in the Standard measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Horsepower-Hour: energy calculations, engineering and science, education.
About Kilojoule
The Kilojoule (symbol: kJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
Common uses of Kilojoule: energy calculations, engineering and science, education.
Frequently Asked Questions
- How many Kilojoules are in 1 Horsepower-Hour?
- There are exactly 2,684.5195377 Kilojoules in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to Kilojoule is 2,684.5195377.
- What is the formula to convert Horsepower-Hour to Kilojoule?
- The formula to convert Horsepower-Hour to Kilojoule is: kJ = hp·h × 2,684.5195377. For example, to convert 10 Horsepower-Hours to Kilojoules, you would multiply 10 by 2,684.5195377.
- What is a Horsepower-Hour?
- The Horsepower-Hour (symbol: hp·h) is a recognized unit in the Standard measurement framework, utilized within energy applications for precision and standardized data representation.
- What is a Kilojoule?
- The Kilojoule (symbol: kJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
- What are the common uses of Horsepower-Hour?
- The Horsepower-Hour is commonly used in energy calculations, engineering and science, education.
Related Energy Conversions
Cite this page
UnitConvertLab. (2026). Horsepower-Hour to Kilojoule converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/horsepower_hour-to-kilojoule