1 horsepower equals approximately 745.7 watts.
To convert from horsepower to watt, you multiply the horsepower value by 745.7 because 1 horsepower is defined as exactly 745.7 watts, based on the mechanical power output. This conversion is used to express engine or motor power in the SI unit, watt, which is standard for electrical and mechanical power measurements.
Conversion Result for 1 Horsepower to Watt
When converting 1 horsepower to watt, the result is 745.7 watt. This means that an engine rated at 1 horsepower produces about 745.7 watts of power.
Conversion Tool
Result in watt:
Conversion Formula
The conversion from horsepower to watt relies on the formula: Watt = Horsepower × 745.7. This formula works because by definition, 1 horsepower equals exactly 745.7 watts. For example, if you have 2 horsepower, multiply 2 by 745.7 to get 1491.4 watts. This step-by-step calculation ensures accurate measurement of power in SI units.
Conversion Example
- Convert 5 horsepower to watt:
- Multiply 5 by 745.7.
- Calculation: 5 × 745.7 = 3728.5 watt.
- This means 5 horsepower equals 3728.5 watts.
- Convert 0.5 horsepower to watt:
- Multiply 0.5 by 745.7.
- Calculation: 0.5 × 745.7 = 372.85 watt.
- This means half a horsepower equals 372.85 watts.
- Convert 10 horsepower to watt:
- Multiply 10 by 745.7.
- Calculation: 10 × 745.7 = 7457 watt.
- This indicates 10 horsepower equals 7457 watts.
Conversion Chart
This chart shows how horsepower values convert to watt, ranging from -24.0 to 26.0. Use it to quickly find the watt equivalent for a given horsepower value. Negative values imply reverse or braking power, but generally, positive values are used for power ratings.
| Horsepower | Watt |
|---|---|
| -24.0 | -1789.0 |
| -20.0 | -1491.4 |
| -15.0 | -1118.55 |
| -10.0 | -745.7 |
| -5.0 | -372.85 |
| 0.0 | 0.0 |
| 1.0 | 745.7 |
| 5.0 | 3728.5 |
| 10.0 | 7457 |
| 15.0 | 11186.5 |
| 20.0 | 14914 |
| 25.0 | 18642.5 |
| 26.0 | 19315.2 |
To use this chart, find the horsepower value in the first column, then read across to find the watt equivalent in the second column.
Related Conversion Questions
- How many watts are in 1.5 horsepower?
- What is the wattage equivalent of 2 horsepower?
- Convert 0.75 horsepower into watts.
- How do I convert horsepower to watt for an electric motor?
- What is the power in watts of a 10-horsepower engine?
- Is 1 horsepower the same as 1000 watts?
- How does the conversion change if I use mechanical versus electrical horsepower?
Conversion Definitions
Horsepower
Horsepower is a unit measuring the power output of engines or motors, historically based on the power a horse can sustain, with one horsepower equaling 745.7 watts; it describes how quickly work is done or energy is transferred over time.
Watt
The watt is the SI unit of power, representing the rate of energy transfer or conversion, equal to one joule per second, used across electrical, mechanical, and thermal systems to quantify how fast work is performed.
Conversion FAQs
Why is 1 horsepower equal to 745.7 watts?
This equivalence is based on the original definition set by James Watt, who observed that a horse could perform a certain amount of work over time, which was later standardized as exactly 745.7 watts, aligning mechanical power measurements with SI units.
Can I convert horsepower to watt using a calculator?
Yes, simply multiply the horsepower value by 745.7 to get the watt equivalent. Many online calculators and the provided tool in this page automate this process, making conversions quick and reducing chances of errors.
Does the conversion change for different types of horsepower?
Yes, there are variations like metric horsepower and electrical horsepower, which have different conversion factors. The standard mechanical horsepower used here is 745.7 watts, but other types may require different calculations.
What practical applications use horsepower to watt conversions?
This conversion is used in automotive engineering, electrical motor specifications, appliance power ratings, and energy calculations where power needs to be expressed in SI units for clarity, comparison, and compliance with international standards.