The International Atomic Energy Agency reported in 2025 that Iran maintained a stockpile of 440.9 kilograms of uranium enriched up to 60% U-235 purity.
September 01, 2025
high
statistical
IAEA safeguards reporting on Iran's declared enriched uranium inventory.
The International Atomic Energy Agency estimated in 2025 that a stockpile of 440.9 kilograms of uranium enriched to 60% purity could be used to build as many as ten nuclear weapons if weaponized.
September 01, 2025
high
statistical
IAEA estimate linking a specific enriched-uranium quantity and enrichment level to potential weaponization capacity.
Uranium enriched to about 60% U-235 is generally considered a short technical step away from weapons-grade uranium, which is typically defined as about 90% U-235.
high
technical
Comparison of enrichment levels used to characterize proximity to weapons-grade material.