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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.

Milliwatt (mW)

The milliwatt (symbol: mW) is a unit of power in the International System of Units (SI) equal to one-thousandth of a watt:

The prefix "milli-" means one-thousandth, making the milliwatt useful for measuring small amounts of power, such as in low-power electronic devices, wireless transmitters, or LED lights.

For example, the power output of a typical laser pointer or a small radio transmitter is often measured in milliwatts.

Milliwatts are widely used in various fields, including electronics, communications, and medical devices, due to their convenience in expressing low power levels without resorting to very small decimal numbers.