Power Converter

Convert between power units: watts, kilowatts, horsepower (mechanical and metric), BTU per hour. Free, instant calculations.

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How It Works

  1. Enter a value — Type any number into the input field. Negative and decimal values are supported.
  2. Select the source unit — Choose the power unit you are converting from (watts, kilowatts, etc.).
  3. Select the target unit — Choose the unit to convert to. The result updates instantly.
  4. Read the result — The converted value appears in bold along with a formula showing the conversion math.

Common Power Conversions

ConversionFormula
Watts to KilowattskW = W ÷ 1,000
Watts to Horsepower (mechanical)hp = W ÷ 745.7
Watts to Horsepower (metric)hp(M) = W ÷ 735.5
Watts to BTU/hBTU/h = W × 3.41214
Kilowatts to Horsepowerhp = kW × 1.34102

About Power Converter

Convert power measurements quickly and accurately between watts, kilowatts, mechanical horsepower, metric horsepower, and BTU per hour. All calculations happen in your browser — nothing is sent to any server.

5 Power Units

Watts, kilowatts, mechanical horsepower, metric horsepower (PS), and BTU per hour. All essential power measurements covered.

Real-Time Results

See conversions update instantly as you type or change units. No submit button needed.

Formula Display

Every conversion shows the underlying math so you can verify results and learn the conversion factors.

Private & Offline

All calculations run in your browser. Nothing sent to any server. Works offline after page load.

📋 Common Use Cases

Quick Conversions

Convert values instantly without memorizing conversion factors or searching for reference tables.

Cross-System Compatibility

Bridge different measurement systems, file formats, or data representations with accurate, reliable conversions.

Professional & Academic Use

Use verified conversion factors for engineering, science, cooking, or international business.

Privacy-Safe Processing

All conversions happen locally in your browser. Your data never leaves your device.

🪜 How to Use This Tool

  1. Enter your value
    Type or paste the value you want to convert. Select the source unit or format from the dropdown.
  2. Choose target format
    Select your desired output unit or format. Common conversions are listed first for quick access.
  3. View the result
    The converted value appears instantly. Conversion formulas and precision details are shown for reference.
  4. Copy or download
    Click to copy the result to clipboard. For file converters, download the converted file directly.

📚 Related Guides

Frequently Asked Questions

Are these converters free?▼
Yes. All converters are completely free. No signup needed.
How accurate is the unit converter?▼
It uses standard conversion factors for length, mass, temperature, area, volume, and speed. Results are precise to 6 decimal places.