Gigawatts (GW): power unit guide

What is being measured?

Power is the rate of energy transfer. Power and energy differ by a time interval; watts and watt-hours cannot be exchanged by a unit factor alone.

Horsepower is mechanical unless marked metric. PS equals metric horsepower. Refrigeration tons use the US 12,000 BTU IT/h convention.

Meaning of GW

Gigawatts uses the symbol GW in this library and measures power. Under the stated reference convention, 1 GW = approximately 1000000000 W. This equivalence changes how a known value is written. It does not increase measurement accuracy or establish whether a measurement is appropriate to a real application.

Conversion method

Multiply the value by the source factor (1e9), then divide by the target factor (1). The factor ratio expresses the same power measurement in the other unit.

Worked example

For a known value of 10 GW, the reference conversion gives 10000000000 W. Converting that result back gives approximately 10 GW. This reverse check helps catch a reversed factor, but matching round-trip arithmetic alone does not independently verify a source definition.

Common reference values

Compare one GW with other units

Precision and common mistakes

• Keep the source and target quantity consistent. A matching symbol is not enough to establish a compatible definition.
• Record the original measurement precision. Showing twelve significant digits in a table does not make a rounded input more precise.
• Check symbol capitalization, prefixes and any regional convention in the source. Use the displayed unit definition rather than a similarly named unit.
• Factors involving repeating fractions or π use finite numerical precision. Round the final answer to the precision justified by your input.

Use a working converter

• Power converter
• Gigawatts to Watts converter
• Gigawatts to Kilowatts converter
• Gigawatts to Megawatts converter
• Gigawatts to btu per hour converter
• Gigawatts to Mechanical horsepower converter

Source and verification scope

Examples and tables are computed from the versioned unit definitions used by the linked converters. The source access dates appear below. Computandum is independent of the cited organizations; a citation does not mean that a publisher endorses this page or an actual project.

Read the calculation and sourcing methodology →