Horsepower to Kilojoules (hp → kJ)
Formula
1 hp = 0.7457 kJConversion Table
| hp | kJ |
|---|---|
| 0 | 0 |
| 1.0000 | 0.74570 |
| 2.0000 | 1.4914 |
| 3.0000 | 2.2371 |
| 4.0000 | 2.9828 |
| 5.0000 | 3.7285 |
| 6.0000 | 4.4742 |
| 7.0000 | 5.2199 |
| 8.0000 | 5.9656 |
| 9.0000 | 6.7113 |
| 10.000 | 7.4570 |
| 11.000 | 8.2027 |
| 12.000 | 8.9484 |
| 13.000 | 9.6941 |
| 14.000 | 10.440 |
| 15.000 | 11.185 |
| 16.000 | 11.931 |
| 17.000 | 12.677 |
| 18.000 | 13.423 |
| 19.000 | 14.168 |
| hp | kJ |
|---|---|
| 20.000 | 14.914 |
| 21.000 | 15.660 |
| 22.000 | 16.405 |
| 23.000 | 17.151 |
| 24.000 | 17.897 |
| 25.000 | 18.642 |
| 26.000 | 19.388 |
| 27.000 | 20.134 |
| 28.000 | 20.880 |
| 29.000 | 21.625 |
| 30.000 | 22.371 |
| 31.000 | 23.117 |
| 32.000 | 23.862 |
| 33.000 | 24.608 |
| 34.000 | 25.354 |
| 35.000 | 26.099 |
| 36.000 | 26.845 |
| 37.000 | 27.591 |
| 38.000 | 28.337 |
| 39.000 | 29.082 |
| hp | kJ |
|---|---|
| 40.000 | 29.828 |
| 41.000 | 30.574 |
| 42.000 | 31.319 |
| 43.000 | 32.065 |
| 44.000 | 32.811 |
| 45.000 | 33.556 |
| 46.000 | 34.302 |
| 47.000 | 35.048 |
| 48.000 | 35.794 |
| 49.000 | 36.539 |
| 50.000 | 37.285 |
| 51.000 | 38.031 |
| 52.000 | 38.776 |
| 53.000 | 39.522 |
| 54.000 | 40.268 |
| 55.000 | 41.014 |
| 56.000 | 41.759 |
| 57.000 | 42.505 |
| 58.000 | 43.251 |
| 59.000 | 43.996 |
| hp | kJ |
|---|---|
| 60.000 | 44.742 |
| 61.000 | 45.488 |
| 62.000 | 46.233 |
| 63.000 | 46.979 |
| 64.000 | 47.725 |
| 65.000 | 48.471 |
| 66.000 | 49.216 |
| 67.000 | 49.962 |
| 68.000 | 50.708 |
| 69.000 | 51.453 |
| 70.000 | 52.199 |
| 71.000 | 52.945 |
| 72.000 | 53.690 |
| 73.000 | 54.436 |
| 74.000 | 55.182 |
| 75.000 | 55.928 |
| 76.000 | 56.673 |
| 77.000 | 57.419 |
| 78.000 | 58.165 |
| 79.000 | 58.910 |
Horsepower to Kilojoules Conversion
Converting Horsepower (hp) to Kilojoules (kJ) is a common energy and power conversion. 1 hp equals 0.7457 kJ. For example, 100 hp is equal to 74.57 kJ.
Quick Mental Math: Horsepower to Kilojoules
For energy conversions, identify the unit scale difference in the prefix or definition.
Why is converting Horsepower to Kilojoules tricky?
Energy unit conversions involve non-linear factors across different measurement systems.
Quick Reference Values
1 hp = 0.7457 kJ. 5 hp = 3.7285 kJ. 10 hp = 7.457 kJ. 25 hp = 18.6425 kJ. 50 hp = 37.285 kJ. 100 hp = 74.57 kJ.
What is Horsepower?
Horsepower (hp) is a unit of energy and power. Horsepower is a unit of power originally defined to compare the output of steam engines with draft horses. The mechanical horsepower equals exactly 745.7 watts, as standardized by the SAE and ISO. It measures the rate of work or energy transfer in engines and motors [nist-cuu]. James Watt introduced the horsepower unit in the late 18th century to market his improved steam engines by equating their power to that of horses. This practical definition facilitated industrial adoption and standardization of power output metrics [nist-cuu]. Horsepower remains common in automotive, marine, and industrial machinery industries, especially in the US and Europe. Although the watt is the SI unit for power, horsepower is often used in marketing and technical specifications [nist-cuu].
What is Kilojoules?
Kilojoules (kJ) is a unit of energy and power. A kilojoule is a unit of energy equal to 1,000 joules. It quantifies work, heat, or energy transfer in the metric system, with one joule defined as one newton meter. Kilojoules are widely applied in physics, chemistry, and nutrition to measure energy content or expenditure [iso-80000]. The joule unit was named after James Prescott Joule in the late 19th century, reflecting mechanical equivalent of heat measurements. The kilojoule, as a multiple, became common with SI adoption to express larger energy quantities clearly and is standardized by ISO and BIPM [bipm-si-brochure]. Kilojoules are standard in scientific disciplines globally for energy quantification. Nutrition labels in many countries use kilojoules to indicate food energy content, while engineering and physics consistently apply kJ for energy calculations [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: horse power, horsepower, hp, horsepwer, horspower, kilojoule, kilo joules, kilojouls, kilojoules energy, kj. All of these refer to the Horsepower to Kilojoules conversion.