Power Converter

Convert power between watts, kilowatts, horsepower and btu/h.

How the Math Works

The Power Converter uses a standardized base unit (watts) to ensure accurate conversions between watts, kilowatts, horsepower, and BTU/h. The formula calculates the result by multiplying the input value by the conversion factor of the source unit relative to the base unit, then dividing by the conversion factor of the target unit. For example, converting 100 horsepower to kilowatts involves first expressing horsepower in watts (1 hp = 745.7 W) and kilowatts in watts (1 kW = 1000 W), then applying the formula: 100 × 745.7 ÷ 1000 = 74.57 kW. This method ensures precision across all unit pairs.

Practical Applications

This calculator is essential for engineers, technicians, and hobbyists working with electrical systems, engines, or heating equipment. For instance, a mechanic comparing a car engine's horsepower rating to its energy consumption in watts (for diagnostic purposes) or an HVAC professional converting BTU/h values to kilowatts when sizing air conditioning units. It also helps students grasp power unit relationships in physics or engineering courses, simplifying complex conversions into a single step.

Day-to-Day Use

In daily life, this tool aids in making informed decisions about appliances, energy usage, and equipment purchases. For example, understanding that a 1500W space heater consumes 1.5kW helps estimate electricity costs, while converting its wattage to BTU/h (5,247 BTU/h) clarifies its heating capacity for home comfort. It’s also useful for DIY projects, such as selecting the right power tool or generator, or interpreting product specifications when traveling to countries using different power units.

Worked example

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FAQ