Nuclear weapons tests per year

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What you should know about this indicator

  • The number of nuclear tests for the United States does not include the bombings of Hiroshima and Nagasaki.
  • This data only includes nuclear tests announced or reported by governments and/or intergovernmental organizations.
  • This data does not include the "Vela Incident" of 1979 because it has not yet officially been declared a nuclear test explosion by any government or intergovernmental organization, although there is strong evidence that suggests it was.
  • India's three simultaneous nuclear test explosions on May 11 are counted as only one, as are the two explosions on May 13. Likewise, Pakistan's five simultaneous explosions on May 28 are counted as a single test.
Arms Control Association (2023) – with minor processing by Our World in Data
Last updated
January 25, 2024
Next expected update
January 2025
Date range

Sources and processing

This data is based on the following sources

This dataset provides the yearly number of nuclear weapons tests by country.

Retrieved on
January 25, 2024
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Arms Control Association - The Nuclear Testing Tally (2023).
Daryl Kimball, Executive Director.

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How to cite this page

To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:

“Data Page: Nuclear weapons tests per year”, part of the following publication: Bastian Herre, Pablo Rosado, Max Roser and Joe Hasell (2024) - “Nuclear Weapons”. Data adapted from Arms Control Association. Retrieved from [online resource]
How to cite this data

In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:

Arms Control Association (2023) – with minor processing by Our World in Data

Full citation

Arms Control Association (2023) – with minor processing by Our World in Data. “Nuclear weapons tests per year” [dataset]. Arms Control Association, “The Nuclear Testing Tally” [original data]. Retrieved July 15, 2024 from