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Kilowatt (kW)

The kilowatt (symbol: kW) is a unit of power in the International System of Units (SI) equal to 1,000 watts:

Kilowatts are widely used to measure the power consumption or output of household appliances, small engines, and electric tools. For example, a typical microwave oven might use about 1 kW of power.

In electricity billing, power usage is often measured in kilowatt-hours (kWh), which reflects energy consumption over time.

The kilowatt is a practical unit for everyday energy use, bridging the scale from watts (for small devices) to megawatts (for larger power generation). It helps people understand and compare the power ratings of common electrical equipment.

Watt (W)

The watt (symbol: W) is the standard unit of power in the International System of Units (SI). It measures the rate at which energy is transferred, converted, or used. One watt is defined as one joule of energy transferred per second:

Power is essentially how quickly work is done or energy is consumed. For example, a 60-watt light bulb uses energy at a rate of 60 joules every second.

The watt can also be expressed in terms of electrical units: one watt equals one volt multiplied by one ampere (1 W = 1 V × 1 A).

The watt is widely used to describe power in mechanical, electrical, and thermal systems. Larger units like kilowatts (kW) or megawatts (MW) are common in industry and power generation.