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Power

Just how powerful is 40 gigawatts?

Large systems

40 GW

Scale

ENERGY EACH SECOND

40 gigawatts

The quantity is exact as entered.

40 GWPower
0
Large grid demand

The total electrical power required by all users connected to a large electricity grid at a given moment.

40 GWPower
0
Power is energy per unit time: one watt is one joule per second.

A little perspective

40 gigawatts is approximately equal to the demand on a large electricity grid.

Measurements, assumptions & sources +

40 gigawatts

Power: 40 GW; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Large grid demand

Power: 40 GW; example.

A defined 40 GW power snapshot, not a claim about a named country or current demand.

Defined examples — our methodology

The marked power is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 40 gigawatts with the demand on a large electricity grid. The notes below explain how each value was chosen.

40 gigawatts

40 GW

Power · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Large grid demand

40 GW

Power · example

A defined 40 GW power snapshot, not a claim about a named country or current demand.

Comparing
Power ↔ Power
Relative size
40 gigawatts is approximately equal to the demand on a large electricity grid.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The demand on a large electricity grid: This is an illustrative comparison value, not a claim that every example is the same.

Power is the rate of energy transfer or use, not the total energy.

4 × 10¹⁰ Wwatts
53,641,000 hpmechanical horsepower

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