Honest projection · estimated
Nuclear Energy Generated Today (est.)
A projection of how much electricity the world’s nuclear reactors have generated since midnight UTC, ticking at the most recent annual total spread evenly across the year. In 2025 nuclear reached an all-time high of 2,812 TWh — yet in the same year solar overtook it, and its share of the world’s power slipped to a 45-year low even as its output set a record. Low-carbon but not renewable, it ticks at roughly a tenth of the rate of the all-electricity counter beside it. The live fleet of stations that produce it — nuclear, hydro, gas, coal and the rest — is one tap away in Grid.
About this number
This is an honest projection, not a census. It is computed by carrying a published figure forward at a known rate over real elapsed time — ≈ 89 MWh/sec (~9% of all power), from Ember Global Electricity Review 2026 — the world’s reactors generated an all-time high of 2,812 TWh in 2025 (8.9% of the mix), spread evenly across the year. The source is Ember Global Electricity Review 2026. The true value is known only to within a margin; this is the running estimate, and we label it as one.