The power converter is a free online tool that helps you convert between common units quickly and accurately. It supports 5 units including Watt (W), Kilowatt (kW), Megawatt (MW), Horsepower (hp), BTU per Hour (BTU/h). The core conversion formula is: 1 watt = 0.00134102 horsepower = 3.41214 BTU/h. For example, 1 Watt equals approximately 0.001 Kilowatt. Conversely, 1 Kilowatt equals approximately 1,000 Watt. Common conversions: 5 W = 0.005 kW, 10 W = 0.01 kW, 25 W = 0.025 kW, 50 W = 0.05 kW, 100 W = 0.1 kW. This converter is useful for students, engineers, scientists, and professionals who need accurate common unit conversions. Whether you are working on homework, technical specifications, research data, or everyday measurements, this tool provides instant, reliable results. All conversions are calculated relative to a single base unit for consistency and precision across all supported units. A watt is defined as one joule per second. One horsepower is approximately 746 watts, defined by James Watt's experiments with horses.