Nuclear Capacity by Country
Nuclear capacity by country measures installed nuclear power plant capacity for each country, in gigawatts (GW). Only 34 countries report values. The statistics are based on the U.S. Energy Information Administration's (EIA) International Energy Statistics. The table covers 34 countries, all of which have a reported value for 2024, and includes data from 2019 to 2024. The world total stood at 378.65 GW in 2024, down from 382.36 GW in 2023.
The United States (98.39 GW) led in 2024, about 1.6 times France (63.00 GW). China (55.32 GW), Russia (26.80 GW) and South Korea (25.61 GW) completed the top five. The United States accounted for about 26.0% of the world total in 2024. The top two together held about 42.6%, the top three about 57.2%, the top five about 71.1%, and the top ten about 85.1%. The United States recorded the largest increase in absolute terms, rising from 95.75 to 98.39 GW (+2.65 GW, about 2.8%). The world total fell from 382.36 to 378.65 GW (-3.71 GW, about 1.0%). Germany recorded the largest decline, dropping from 4.06 GW in 2023 to zero in 2024. Its 4.06 GW reduction was larger than the net gains across the rest of the countries combined. The United States (+2.8%), France (+2.7%) and China (+2.2%) all expanded in 2024, while Russia remained unchanged at 26.80 GW and South Korea edged down 0.8%. Ukraine also held steady at 13.11 GW. Germany was the only major decline, falling from 4.06 GW to zero. Reported world values were 369.57 GW in 2019, 371.66 GW in 2020, 372.34 GW in 2021, 371.52 GW in 2022, 382.36 GW in 2023 and 378.65 GW in 2024. Despite the decline in 2024, total nuclear capacity ended about 2.5% above its 2019 level. Installed capacity changes relatively slowly because it reflects the power plants available to a country. Electricity generation can move much more sharply from one year to the next as existing reactors operate for more or fewer hours. France illustrates the difference: its nuclear capacity increased 2.7% in 2024, while nuclear generation increased 12.8%. Germany shows the other extreme, with both capacity and generation reaching zero after the country's final reactors left the series. The statistics are based on the U.S. Energy Information Administration's (EIA) International Energy Statistics. Values represent annual installed nuclear capacity in gigawatts (GW). Where no value is available, the cell is left empty. A value of 0 indicates that the source reports zero, as with Germany in 2024. The sum of the countries listed on this page may not equal the reported world total because the country-level data presented here do not necessarily represent the complete set of values used for the world total. This page covers nuclear capacity only; generation and other sources are reported separately in the source.
Nuclear Capacity by Country
1
98.39
2
63
3
55.32
4
26.8
5
25.61
6
13.11
7
12.71
8
12.63
9
7.55
10
7.12
11
7.01
12
5.88
13
5.35
14
4.37
15
3.96
16
3.46
17
3.26
18
2.97
19
2.3
20
2.22
21
2.01
22
1.92
23
1.88
24
1.85
25
1.64
26
1.55
27
1.3
28
0.95
29
0.92
30
0.7
31
0.48
32
0.42
33
0
34
0
Germany's nuclear exit reshaped the 2024 total
The United States remains the largest nuclear fleet
A small net increase over six years
Capacity does not move like generation
Nuclear Capacity by Country
#
1
98.12
96.5
95.55
94.66
95.75
98.39
2
63.13
61.37
61.37
61.37
61.37
63
3
45.52
49.89
50.02
52.15
54.15
55.32
4
28.37
28.58
27.73
27.73
26.8
26.8
5
23.09
23.15
24.43
24.49
25.83
25.61
6
13.11
13.11
13.11
13.11
13.11
13.11
7
13.55
13.62
13.62
13.62
13.7
12.71
8
8.71
7.86
9.49
9.87
15.86
12.63
9
6.78
6.78
6.78
6.78
6.92
7.55
10
7.12
7.12
7.12
7.12
7.12
7.12
11
7.72
6.88
6.89
6.94
6.94
7.01
12
8.92
8.92
6.85
5.88
5.88
5.88
13
0
1.35
2.76
4.01
5.32
5.35
14
2.87
2.79
2.79
4.68
4.39
4.37
15
3.93
3.93
3.93
3.93
3.93
3.96
16
5.93
5.94
5.94
3.93
3.91
3.46
17
1.32
1.32
2.33
3.26
3.26
3.26
18
2.96
2.96
2.97
2.97
2.97
2.97
19
1.81
1.84
1.87
2.31
2.31
2.3
20
0
1.11
1.11
1.11
2.22
2.22
21
2.01
2.01
2.01
2.01
2.01
2.01
22
1.9
1.9
1.92
1.92
1.92
1.92
23
1.88
1.88
1.88
1.88
1.88
1.88
24
1.86
1.86
1.85
1.85
1.85
1.85
25
1.64
1.64
1.64
1.64
1.64
1.64
26
1.55
1.55
1.55
1.55
1.55
1.55
27
1.3
1.3
1.3
1.3
1.3
1.3
28
3.87
3.87
2.89
2.89
1.9
0.95
29
0.92
0.92
0.92
0.92
0.92
0.92
30
0.69
0.69
0.69
0.69
0.69
0.7
31
0.48
0.48
0.48
0.48
0.48
0.48
32
0.38
0.42
0.45
0.42
0.42
0.42
33
8.11
8.11
8.11
4.06
4.06
0
34
0
0
0
0
0
0
Methodology
Frequently Asked Questions
Which countries have the most nuclear capacity?
The United States (98.39 GW) and France (63.00 GW) reported the largest 2024 values, followed by China (55.32 GW), Russia (26.80 GW) and South Korea (25.61 GW).
How much did world nuclear capacity change in 2024?
World nuclear capacity fell from 382.36 GW in 2023 to 378.65 GW in 2024, a decrease of 3.71 GW or about 1.0%. Germany's capacity fell by 4.06 GW to zero, more than offsetting increases elsewhere.
Did Germany really reach zero?
Germany reported 4.06 GW in 2023 and 0 in 2024. Zero means that the source reports zero, not a missing value.
Is capacity the same as generation?
No. Capacity measures installed generating equipment, while generation measures the electricity actually produced. French capacity grew 2.7% in 2024 while its generation rebounded 12.8%.
Data Disclaimer: Projected data (future years) are estimates based on mathematical models. Actual values may differ. Learn about our methodology →
Sources
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Updated: 10.09.2026https://www.eia.gov/international/data/browser/
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