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Sources and Accuracy
Power conversions use watt as the reference unit and include mechanical horsepower, electrical power, and heat-rate units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
kilowatt [kW]
Definition
The kilowatt is a power unit equal to 1000 watts.
History
Kilowatts became common as electrical and mechanical systems needed larger power ratings.
Current use
Kilowatts are used for generators, electric vehicles, HVAC, solar systems, appliances, and energy planning.
megawatt [MW]
Definition
The megawatt (MW) is a power unit used to express measurements in this converter.
History
This unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current use
Use megawatt when comparing power values, checking specifications, converting between systems, or preparing quick estimates.