Power Converter

Power measures the rate at which energy is used or delivered, and different industries have historically settled on different favorite units for it. Electrical devices are usually rated in watts or kilowatts, vehicle engines are often rated in horsepower, heating and cooling equipment frequently uses BTU per hour, and large air conditioning systems are sometimes rated in tons of refrigeration. Because all of these describe the same underlying rate of energy flow, they convert precisely using fixed numeric factors relative to the watt, the SI unit of power.

Using the converter is straightforward: choose the unit your value is currently expressed in as the "from" unit, choose your desired unit as the "to" unit, and enter your number. As you type, the converted figure updates live without any extra steps. If you picked the units in the wrong order, the swap button instantly reverses the direction of conversion. Below the main conversion, an all-units table shows your entered value already converted into every other supported power unit at once, which is convenient when comparing an engine's horsepower rating against its wattage equivalent, or comparing air conditioner ratings given in different unit systems. An adjustable precision setting lets you control how many decimal places are shown in the results.

Suppose an engine is rated at 150 mechanical horsepower and you want the equivalent in kilowatts for a specification sheet. Multiply 150 by 745.699872 to get 111,854.98 watts, then divide by 1,000 to express it in kilowatts, giving approximately 111.85 kW.

In the converter, you'd set "from" to mechanical horsepower and "to" to kilowatts, then enter 150. The live result immediately shows about 111.85 kW. The all-units table also displays the same power rating in metric horsepower, roughly 152.05 PS, letting you see both horsepower conventions and the metric wattage figure together without running separate calculations for each unit.