A gigawatt-hour (GWh) is a unit of energy representing one billion watt-hours, or one million kilowatt-hours. To put it into perspective, a single gigawatt-hour can power approximately 750,000 homes for an hour or a modest-sized city for a few hours! This unit is commonly used in measuring the output of power stations or the amount of electricity consumed over a span.
Interestingly, the largest solar farm in the world, Noor Abu Dhabi, boasts a capacity of about 1,177 gigawatts per year, reflecting how renewable energy advancements continue to scale. As nations transition to greener power, understanding energy units like the gigawatt-hour becomes crucial in evaluating our global energy impact and future sustainability targets.
The watt-second is a unit of energy that represents the amount of work done when a power of one watt is sustained for one second. This unit is a direct way to visualize energy transfer in everyday activities. Interestingly, while it may sound abstract, this unit can be directly applied to understand how quick appliances like LED lights or small electronic devices consume energy. For example, a modern LED bulb that consumes 10 watts of power will use 10 watt-seconds of energy every second it is on.
While commonly overshadowed by the more familiar joule, the watt-second is essentially equivalent to one joule. Its simplicity in denoting power over time makes it a cornerstone concept in physics and engineering, where it is applied to calculate specific energy transfers and efficiency in varied systems. Exploring this unit helps bridge the gap between theoretical energy calculations and practical everyday energy use.
| Gigawatt-hours | Watt-seconds |
|---|---|
0
GWh
|
0
Ws
|
0.1
GWh
|
3.6e+11
Ws
|
0.2
GWh
|
7.2e+11
Ws
|
0.3
GWh
|
1.08e+12
Ws
|
0.4
GWh
|
1.44e+12
Ws
|
0.5
GWh
|
1.8e+12
Ws
|
0.6
GWh
|
2.16e+12
Ws
|
0.7
GWh
|
2.52e+12
Ws
|
0.8
GWh
|
2.88e+12
Ws
|
0.9
GWh
|
3.24e+12
Ws
|
1
GWh
|
3.6e+12
Ws
|
1.1
GWh
|
3.96e+12
Ws
|
1.2
GWh
|
4.32e+12
Ws
|
1.3
GWh
|
4.68e+12
Ws
|
1.4
GWh
|
5.04e+12
Ws
|
1.5
GWh
|
5.4e+12
Ws
|
1.6
GWh
|
5.76e+12
Ws
|
1.7
GWh
|
6.12e+12
Ws
|
1.8
GWh
|
6.48e+12
Ws
|
1.9
GWh
|
6.84e+12
Ws
|
2
GWh
|
7.2e+12
Ws
|
2.1
GWh
|
7.56e+12
Ws
|
2.2
GWh
|
7.92e+12
Ws
|
2.3
GWh
|
8.28e+12
Ws
|
2.4
GWh
|
8.64e+12
Ws
|
2.5
GWh
|
9e+12
Ws
|
2.6
GWh
|
9.36e+12
Ws
|
2.7
GWh
|
9.72e+12
Ws
|
2.8
GWh
|
1.008e+13
Ws
|
2.9
GWh
|
1.044e+13
Ws
|
3
GWh
|
1.08e+13
Ws
|
3.1
GWh
|
1.116e+13
Ws
|
3.2
GWh
|
1.152e+13
Ws
|
3.3
GWh
|
1.188e+13
Ws
|
3.4
GWh
|
1.224e+13
Ws
|
3.5
GWh
|
1.26e+13
Ws
|
3.6
GWh
|
1.296e+13
Ws
|
3.7
GWh
|
1.332e+13
Ws
|
3.8
GWh
|
1.368e+13
Ws
|
3.9
GWh
|
1.404e+13
Ws
|
4
GWh
|
1.44e+13
Ws
|
4.1
GWh
|
1.476e+13
Ws
|
4.2
GWh
|
1.512e+13
Ws
|
4.3
GWh
|
1.548e+13
Ws
|
4.4
GWh
|
1.584e+13
Ws
|
4.5
GWh
|
1.62e+13
Ws
|
4.6
GWh
|
1.656e+13
Ws
|
4.7
GWh
|
1.692e+13
Ws
|
4.8
GWh
|
1.728e+13
Ws
|
4.9
GWh
|
1.764e+13
Ws
|
5
GWh
|
1.8e+13
Ws
|
5.1
GWh
|
1.836e+13
Ws
|
5.2
GWh
|
1.872e+13
Ws
|
5.3
GWh
|
1.908e+13
Ws
|
5.4
GWh
|
1.944e+13
Ws
|
5.5
GWh
|
1.98e+13
Ws
|
5.6
GWh
|
2.016e+13
Ws
|
5.7
GWh
|
2.052e+13
Ws
|
5.8
GWh
|
2.088e+13
Ws
|
5.9
GWh
|
2.124e+13
Ws
|
6
GWh
|
2.16e+13
Ws
|
6.1
GWh
|
2.196e+13
Ws
|
6.2
GWh
|
2.232e+13
Ws
|
6.3
GWh
|
2.268e+13
Ws
|
6.4
GWh
|
2.304e+13
Ws
|
6.5
GWh
|
2.34e+13
Ws
|
6.6
GWh
|
2.376e+13
Ws
|
6.7
GWh
|
2.412e+13
Ws
|
6.8
GWh
|
2.448e+13
Ws
|
6.9
GWh
|
2.484e+13
Ws
|
7
GWh
|
2.52e+13
Ws
|
7.1
GWh
|
2.556e+13
Ws
|
7.2
GWh
|
2.592e+13
Ws
|
7.3
GWh
|
2.628e+13
Ws
|
7.4
GWh
|
2.664e+13
Ws
|
7.5
GWh
|
2.7e+13
Ws
|
7.6
GWh
|
2.736e+13
Ws
|
7.7
GWh
|
2.772e+13
Ws
|
7.8
GWh
|
2.808e+13
Ws
|
7.9
GWh
|
2.844e+13
Ws
|
8
GWh
|
2.88e+13
Ws
|
8.1
GWh
|
2.916e+13
Ws
|
8.2
GWh
|
2.952e+13
Ws
|
8.3
GWh
|
2.988e+13
Ws
|
8.4
GWh
|
3.024e+13
Ws
|
8.5
GWh
|
3.06e+13
Ws
|
8.6
GWh
|
3.096e+13
Ws
|
8.7
GWh
|
3.132e+13
Ws
|
8.8
GWh
|
3.168e+13
Ws
|
8.9
GWh
|
3.204e+13
Ws
|
9
GWh
|
3.24e+13
Ws
|
9.1
GWh
|
3.276e+13
Ws
|
9.2
GWh
|
3.312e+13
Ws
|
9.3
GWh
|
3.348e+13
Ws
|
9.4
GWh
|
3.384e+13
Ws
|
9.5
GWh
|
3.42e+13
Ws
|
9.6
GWh
|
3.456e+13
Ws
|
9.7
GWh
|
3.492e+13
Ws
|
9.8
GWh
|
3.528e+13
Ws
|
9.9
GWh
|
3.564e+13
Ws
|
10
GWh
|
3.6e+13
Ws
|
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