– = nil or a negligible value.
Notes: All estimates are approximate. SIPRI revises its world nuclear forces data each year based on new information and updates to earlier assessments. The data for Jan. 2025 replaces all previously published SIPRI data on world nuclear forces. Countries are ordered by date of first known nuclear test; however, there is no conclusive open-source evidence that Israel has tested its nuclear weapons. Russia and the USA no longer publish aggregate numbers for strategic nuclear forces limited by the 2010 Treaty on Measures for the Further Reduction and Limitation of Strategic Offensive Arms (New START).
a ‘Deployed warheads’ refers to warheads placed on missiles or located on bases with operational forces.
b ‘Stored warheads’ refers to stored or reserve warheads that would require some preparation (e.g. installation of certain components, transport and loading on to launchers) before they could be deployed.
c ‘Military stockpile’ refers to all deployed warheads as well as warheads in central storage that could potentially be deployed.
d ‘Retired warheads’ refers to warheads that have been retired from the military stockpile but have not yet been dismantled.
e ‘Total inventory’ refers to both stockpiled and retired warheads.
f The year-on-year decrease in SIPRI’s estimate of Russia’s stockpile was largely due to a reassessment by SIPRI of the number of warheads assigned to non-strategic (tactical) nuclear forces.
g Information about the status and capability of North Korea’s nuclear arsenal comes with significant uncertainty. North Korea might have produced enough fissile material to produce up to 90 nuclear warheads; however, it is likely that it has assembled fewer warheads, perhaps up to 50.
h Based on new assessments, SIPRI estimates that the overall global inventory stood at 12 405 in Jan. 2024 rather than 12 121 as published in SIPRI Yearbook 2024.
Source: SIPRI Yearbook 2025.
Notes: All estimates are approximate. SIPRI revises its world nuclear forces data each year based on new information and updates to earlier assessments. The data for Jan. 2025 replaces all previously published SIPRI data on world nuclear forces. Countries are ordered by date of first known nuclear test; however, there is no conclusive open-source evidence that Israel has tested its nuclear weapons. Russia and the USA no longer publish aggregate numbers for strategic nuclear forces limited by the 2010 Treaty on Measures for the Further Reduction and Limitation of Strategic Offensive Arms (New START).
Click here for additional notes.
a ‘Deployed warheads’ refers to warheads placed on missiles or located on bases with operational forces.
b ‘Stored warheads’ refers to stored or reserve warheads that would require some preparation (e.g. installation of certain components, transport and loading on to launchers) before they could be deployed.
c ‘Military stockpile’ refers to all deployed warheads as well as warheads in central storage that could potentially be deployed.
d ‘Retired warheads’ refers to warheads that have been retired from the military stockpile but have not yet been dismantled.
e ‘Total inventory’ refers to both stockpiled and retired warheads.
f The year-on-year decrease in SIPRI’s estimate of Russia’s stockpile was largely due to a reassessment by SIPRI of the number of warheads assigned to non-strategic (tactical) nuclear forces.
g Information about the status and capability of North Korea’s nuclear arsenal comes with significant uncertainty. North Korea might have produced enough fissile material to produce up to 90 nuclear warheads; however, it is likely that it has assembled fewer warheads, perhaps up to 50.
h Based on new assessments, SIPRI estimates that the overall global inventory stood at 12 405 in Jan. 2024 rather than 12 121 as published in SIPRI Yearbook 2024.