Based on existing and planned projects, its total capacity could reach nearly 186 gigawatts, far surpassing the U.S., which currently leads globally. This shift reflects a broader push to secure reliable, low-carbon energy as electricity demand rises.

This chart, via Visual Capitalist's Tasmin Lockwood, ranks countries by current and prospective nuclear capacity, using data from Global Energy Monitor.

How Nuclear Energy Is Set to Scale by Country

The U.S. currently leads nuclear energy production with a capacity of 102,475 megawatts, exceeding France by more than 35,000 MW.

China ranks third today at 60,898 MW, but that is set to change as new plants come online.

Dive into the data, which includes sites of any capacity as of September 2025, below: