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The watt (W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m 2 ⋅s −3. It is named after James Watt, an 18th-century Scottish inventor who improved the steam engine.
Learn the definition, history and units of wattage, the measure of power in electricity. Find out how watts are related to volts, amps and ohms, and how to calculate watt-hours.
Learn how to calculate and measure power in watts, and how it relates to energy consumption and usage. Find out the difference between watts and watt-hours, and see examples of wattage for common appliances and devices.
Learn how to calculate watts, volts, amps, and ohms using Watt's and Ohm's laws. Use the watt calculator to find the missing values in simple electrical circuits.
How to convert watts to kilowatts. The power P in kilowatts (kW) is equal to the power P in watts (W) divided by 1000: P (kW) = P (W) / 1000. How to convert watts to milliwatts. The power P in milliwatts (mW) is equal to the power P in watts (W) times 1000: P (mW) = P (W) ⋅ 1000. How to convert watts to dBm
Watt, unit of power in the International System of Units (SI) equal to one joule of work performed per second, or to 1746 horsepower. An equivalent is the power dissipated in an electrical conductor carrying one ampere current between points at one volt potential difference. It is named in honour
In an electrical circuit-- whether direct current (DC) or alternating current (AC) -- power is the product of the current and voltage. Current, which is measured in amperes (A), is the rate at which the energy flows. Voltage, which is measured in volts (), is the difference in charge between two points.According to the SI standard, one volt is equal to one watt divided by one amp:
Learn the definition, measurement, and calculation of watt, the SI unit of power, and its applications in electromagnetic energy. Find out the difference between watt and lumen, and how to choose the best light bulb based on these parameters.
Learn what a watt is, how it measures the rate of energy transfer of an appliance, and how it relates to other units of power. Find examples, equations, and conversions of watts to kilowatts, megawatts, and gigawatts.