The Power Converter allows you to convert between various power units quickly and accurately, making it ideal for engineering and energy analysis tasks.
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Power Converter
Unit Converter
Convert power units instantly.
Mode
Batch mode converts multiple values (paste one number per line).
Value
Values (batch mode)
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To
Precision (decimal places)
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What is Power Converter?
Use the Power Converter to easily convert power units like watts, kilowatts, and horsepower. Perfect for electrical and mechanical engineering calculations, this tool provides instant results in your browser without the need for software installation. Simply enter your power value, select the units, and get accurate conversions. Try it with a small sample today!
What are common questions about Power Converter?
What power units are supported by this converter?
Our tool supports a wide range of power units, including Watts (W), Kilowatts (kW), Megawatts (MW), Gigawatts (GW), milliWatts (mW), microWatts (µW), Horsepower (HP), Metric Horsepower (PS), Foot-Pounds per Minute (ft-lb/min), and BTU per Hour (BTU/hr).
How accurate is the Power Converter for engineering and energy calculations?
Our online Power Converter uses precise, standard mathematical conversion factors, ensuring high accuracy suitable for engineering calculations, energy analysis, technical applications, and comparing specifications.
What is BTU per hour (BTU/hr) and where is it used?
BTU per Hour (BTU/hr) is a unit of power commonly used in heating, ventilation, and air conditioning (HVAC) systems, as well as for rating water heaters and grills, particularly in the United States. It measures the rate of energy transfer as heat.
How do I convert watts to kilowatts?
To convert Watts (W) to Kilowatts (kW), select 'Watts' as your 'Convert From' unit and 'Kilowatts' as your 'Convert To' unit. Enter the value in Watts, and the converter will instantly show you the equivalent in Kilowatts. (1 Kilowatt = 1000 Watts).
Can I convert between kilowatts (kW) and horsepower (HP)?
Yes, this is a very common conversion for comparing engine power or motor ratings. Select 'Kilowatts' as the input and 'Horsepower' as the output (or vice versa), enter the value, and get the conversion. Our tool includes both standard mechanical HP and metric horsepower (PS).
Is the Power Converter tool completely free?
Yes, our Power Converter is 100% free to use online. There are no costs, subscriptions, or limitations on the number of power conversions you can perform.
What are the key features of Power Converter?
Get Instant, Accurate Power Conversions
Receive precise power conversion results in real-time as you enter values. Our converter uses standard, accurate factors for reliable measurements every time.
Supports Electrical, Mechanical & Thermal Power Units
Convert between a comprehensive range of power units including Watts (W), Kilowatts (kW), Megawatts (MW), Horsepower (HP - mechanical and electrical), Metric Horsepower (PS), Foot-Pounds per Minute (ft-lb/min), BTU per Hour (BTU/hr), and more. Covers units used across different engineering and technical fields.
Precise Results for Engineering, Energy, & Automotive
Whether you're working on energy consumption calculations, comparing engine power (kW vs HP), designing electrical systems, or evaluating HVAC performance (BTU/hr), rely on our tool for high-precision power conversions.
Easy-to-Use Power Converter
Convert power units quickly and effortlessly with a clean, intuitive interface. Our tool is designed for speed and simplicity, accessible on any device.
How do you use Power Converter?
Enter the Power Value
Input the power measurement value that you need to convert into the designated field. The tool will instantly calculate the conversion.
Get Your Accurate Conversion Results
See the precise converted power displayed immediately for the target unit you selected. Fast, accurate, and reliable power unit conversion.
Select Your Power Units
Choose the power unit you want to convert from and to. For example, select Watts to Kilowatts, Horsepower to Watts, or BTU/hr to Kilowatts.
Different Types of Power and Their Units
Power can manifest in various forms, including electrical power (rate of electrical energy flow), mechanical power (rate of doing work), thermal power (rate of heat transfer), etc. While the Watt is the universal SI unit for all forms of power, specific units are common in different fields. For example, electrical power is often in Watts (W), Kilowatts (kW). Mechanical power uses Horsepower (HP) or foot-pounds per minute (ft-lb/min). Thermal power might use BTU per hour (BTU/hr) or calories per second.
Why Accurate Power Conversion is Important
Accurate power conversion is critical for comparing specifications of devices or systems (e.g., choosing between two motors rated in kW vs HP), calculating energy efficiency, designing electrical or mechanical systems, and understanding energy bills (often based on kilowatt-hours, a unit of energy, which relates directly to power). Using a reliable converter ensures precise calculations and informed decisions.
What is Power?
Power is the rate at which work is done or energy is transferred or converted. In simpler terms, it measures how quickly energy is used or produced. The standard SI unit for power is the Watt (W). Understanding power and being able to convert between different power units is essential across various scientific, engineering, and everyday applications.
Common Power Units and Where They Are Used
Watts (W) are used for small electrical devices (light bulbs). Kilowatts (kW) are used for larger appliances and rating electrical power consumption or generation. Megawatts (MW) and Gigawatts (GW) are for power plants or large industrial facilities. Horsepower (HP) is commonly used for rating engines and motors (cars, pumps). Metric Horsepower (PS) is a similar unit used in some countries. BTU/hr is prevalent in HVAC systems.
Power vs. Energy: Understanding the Difference
It's important not to confuse power with energy. Power is the rate at which energy is used or transferred (Energy per unit time). Energy is the total amount of work done or heat transferred (often measured in Joules, Watt-hours, kilowatt-hours, calories). Think of power as the speed of using energy. Our tool focuses on converting the rate (Power), not the total amount (Energy), although these concepts are closely related.
Converting Between Electrical, Mechanical, and Thermal Units
Our Power Converter allows conversion not just within electrical units (W to kW) or mechanical units (HP to ft-lb/min), but also between different types of power (e.g., Watts to Horsepower, Kilowatts to BTU/hr). These conversions are based on fixed relationships established by definitions of the units, enabling you to work seamlessly across different engineering disciplines or compare diverse systems.
Free · API · MCPToolYour platform
Use Power Converter three ways
The free Power Converter on this page works in your browser. The same workflow is available via REST API for apps and via the remote MCP server for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the unit-conversions module under Business Tools.
- 1Create a free accountGet an API key for REST and MCP — 500 credits/month on the free tier.
- 2Connect or callPaste the MCP URL into Cursor/Claude, or call REST with
X-Api-Key. - 3Same key & creditsBrowser smoke-checks stay free; API-backed runs share one monthly credit quota.
- Free in browserUse Power Converter here — no account required.
- REST APICall from your server with
X-Api-Key. - Remote MCP serverSame job from Cursor or Claude via the ToolYour remote MCP server — one API key with REST.
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