Power Conversion Calculator
Convert between power units: watts, kilowatts, horsepower and more, instantly. No signup. Ideal for engineering, electronics, vehicles and technical work.
Share on Social Media:
This power converter turns any power between units, watts, kilowatts, horsepower and more, directly in your browser. Enter a value and its unit, and see the equivalent in others. No account, no install, so you can convert power for engineering, electronics and vehicles on any device in seconds.
How to Convert Power Units Step by Step
- Enter the power. Type the power value you want to convert into the input field, such as a rating from a specification or a reading.
- Choose the starting unit. Select the unit your power is in, whether watts, kilowatts, horsepower, or another power unit.
- Convert to other units. The tool converts your power into the other units, showing the equivalent values so you can see the power expressed however you need.
- Read the equivalents. See your power in the relevant units at once, letting you understand and compare it across the different power units used in various fields.
- Use the converted value. Apply the converted power to your engineering, electronics, or vehicle related task, working in whichever unit suits your context.
What Power Is and How It Is Measured
Power is the rate at which energy is used or work is done, and it is measured in several units across different fields. The watt is the standard scientific unit, with the kilowatt being a thousand watts, common for larger powers. Horsepower is a traditional unit still widely used, particularly for engines and vehicles. These different units reflect the varied contexts in which power is measured, from electronics to engineering to motoring.
The metric power units, watts and kilowatts, relate simply by powers of ten, a kilowatt being a thousand watts, which makes conversions between them straightforward. Horsepower, however, relates to watts by a specific, non round conversion factor, a legacy of its traditional origins. This means converting between horsepower and the metric units involves a factor that is not memorable, unlike the simple relationship between watts and kilowatts.
Converting between horsepower and the metric units is where a converter is especially useful, because the conversion factor is specific and hard to remember. Comparing an engine's power in horsepower with an electrical rating in kilowatts, or vice versa, requires this conversion. A power converter handles it exactly, letting you relate powers given in horsepower and the metric units accurately, without needing to know or look up the conversion factor.
Power conversion is needed in engineering, electronics, and anything involving engines or motors. Electrical devices and systems are rated in watts and kilowatts, while vehicle and engine power is often given in horsepower, so comparing or working across these requires conversion. A power converter gives quick, accurate results for any power in any unit, useful whenever powers in different units must be understood or compared.
The Common Power Units and Their Uses
| Unit | Common use | Note |
|---|---|---|
| Watt | Electronics, science | The standard unit |
| Kilowatt | Larger electrical power | A thousand watts |
| Horsepower | Engines, vehicles | Traditional, non round factor |
| Converting | Between metric and horsepower | Specific factor, use a converter |
Who Uses a Power Converter
Pro Tips for Power Conversions
Common Power Conversion Mistakes to Avoid
Related Tools You May Need Next
For other unit conversions, our Voltage Converter, Pressure Converter and Torque Converter help with related engineering and technical units.
Frequently Asked Questions
How do I convert between power units?
Enter your power value and select its unit, whether watts, kilowatts, horsepower or another, and the tool converts it into the other units, showing the equivalent values. This lets you express a power in whatever unit you need and compare it across the different units used in various fields. While watts and kilowatts relate simply by a thousand, horsepower relates by a specific, non round factor that is hard to remember, so the converter is especially useful for conversions involving horsepower, applying the correct factors exactly for accurate results.
What is power and how is it measured?
Power is the rate at which energy is used or work is done. It is measured in several units across different fields: the watt, the standard scientific unit; the kilowatt, being a thousand watts, common for larger powers; and horsepower, a traditional unit still widely used, particularly for engines and vehicles. These different units reflect the varied contexts in which power is measured, from electronics and science, where watts and kilowatts are standard, to motoring and engines, where horsepower is common. Converting between them is often needed to understand or compare power figures.
What are the common power units?
The common power units include the watt, which is the standard scientific unit used in electronics and physics; the kilowatt, which is a thousand watts, used for larger electrical powers; and horsepower, a traditional unit still widely used, particularly for engines and vehicles. Watts and kilowatts are the metric units, relating simply by a factor of a thousand, while horsepower relates to them by a specific, non round conversion factor. Each unit is associated with particular contexts, which is why converting between them is needed when working across fields such as electronics and motoring.
Why is horsepower harder to convert?
Because horsepower relates to the metric power units, watts and kilowatts, by a specific conversion factor that is not a round number and is hard to remember, a legacy of its traditional origins. In contrast, watts and kilowatts relate to each other simply by a factor of a thousand, which is easy. So converting between horsepower and the metric units involves an awkward factor that few people know precisely, unlike the simple metric relationship. This is why a power converter is especially useful for horsepower conversions: it applies the specific factor exactly, avoiding the errors of trying to remember or estimate it.
How do I compare engine power in horsepower and kilowatts?
Engine power is often given in horsepower, while electrical power is rated in kilowatts, so to compare them you need to convert one to the other's unit. Enter the power and its unit into the converter to see the equivalent in the other unit, then compare. Because horsepower relates to the metric units by a specific, non round factor, doing this conversion by estimation is error prone, so the converter is valuable for accurate comparisons. Converting both figures to a common unit lets you compare engine and electrical power fairly and see which is greater in equivalent terms.
What power unit is used for electrical devices?
Electrical devices and systems are rated in watts and kilowatts, the metric power units. The watt is the standard unit, and the kilowatt, being a thousand watts, is used for larger electrical powers. So when working with electrical power, consumption, or ratings, these metric units are standard. They relate to each other simply by a factor of a thousand, making conversions between them straightforward. When you need to compare an electrical rating in kilowatts with a power given in horsepower, such as an engine's, you convert between the metric units and horsepower using the specific conversion factor, which the converter handles.
Who needs to convert power units?
Power conversion is needed in engineering, electronics, and anything involving engines or motors. Engineers convert power between units when working with specifications and equipment. People working with electrical devices convert between watts and kilowatts to understand ratings and consumption. Vehicle and engine enthusiasts convert engine power between horsepower and kilowatts to compare or understand figures. Students convert power units in physics calculations. Anyone comparing powers given in different units converts them to a common unit. A power converter serves all these needs, giving quick, accurate results for any power in any unit.
Is the power converter free?
Yes, it is completely free with no account and no usage limit. You can convert as many powers between units as you like, as often as you like, at no cost. It runs entirely in your browser on any device, so there is nothing to download or install, and the equivalent powers in other units appear instantly whenever you enter a value and choose its unit, helping with engineering, electronics, vehicles and technical power conversions.