Russia maintains the world’s largest nuclear inventory, but the exact size and readiness of its arsenal are not publicly known. The most detailed 2026 open-source assessment by the Federation of American Scientists (FAS) estimates about 5,420 nuclear warheads in Russia’s total inventory, including roughly 4,400 warheads assigned to operational strategic and non-strategic forces and about 1,020 retired warheads awaiting dismantlement. Of the 4,400-warhead military stockpile, approximately 1,796 strategic warheads are estimated to be deployed.
Russia’s nuclear capability is built around a diversified triad of land-based intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs), and strategic bombers, supplemented by a much larger and more opaque collection of non-strategic nuclear-capable systems. The important distinction is that a missile or aircraft being nuclear-capable does not mean it is carrying a nuclear warhead: many Russian delivery systems are dual-capable and can carry either conventional or nuclear weapons.
How large is Russia’s nuclear arsenal?
Exact numbers are inherently uncertain because Russia does not publish a complete, current inventory of its nuclear warheads and delivery systems. Analysts therefore reconstruct the arsenal using official statements, historical arms-control data, satellite imagery, military procurement information and other open sources. SIPRI likewise emphasizes that its nuclear-force estimates are based on publicly available information.
The latest FAS estimate provides a useful distinction between total inventory, military stockpile and deployed weapons:
Category Estimated Russian nuclear warheads, 2026 What the figure means
Deployed strategic warheads ~1,796 Assigned to operational ICBMs, submarines and bomber forces
Strategic warheads in storage ~810 Held for strategic forces but not deployed
Non-strategic warheads ~1,794 Assigned to shorter-range and other non-strategic systems; exact status is uncertain
Military stockpile ~4,400 Estimated warheads potentially available for military use
Retired, awaiting dismantlement ~1,020 No longer assigned to operational forces but not yet dismantled
Total inventory ~5,420 Military stockpile plus retired warheads awaiting dismantlement
Source: Federation of American Scientists, Russian Nuclear Weapons, 2026. Figures are estimates rather than Russian government disclosures.
The numbers should not be read as a real-time count of weapons sitting on launchers. In particular, Russia’s non-strategic arsenal is considerably harder to estimate than its strategic forces. Many of its shorter-range systems are dual-capable, while public information about the number and location of associated warheads is limited. FAS therefore assigns considerably lower confidence to some non-strategic estimates than to its assessment of strategic forces.
For a broader examination of the estimated inventory, its categories and the distinction between deployed, stored and retired weapons, see Russia’s nuclear arsenal and what is publicly known about its warheads and delivery systems.
Russia’s nuclear triad
Russia inherited a substantial Soviet nuclear infrastructure but has spent decades replacing older systems with newer missiles, submarines and aircraft. FAS describes the country as being in the later stages of a multi-decade modernization program, although several programs have experienced delays.
Land-based ICBMs
The land-based component remains central to Russia’s strategic deterrent.
Russia operates silo-based and mobile ICBMs, giving it two different forms of survivability. Fixed silos provide hardened launch infrastructure, while mobile missiles complicate an adversary’s ability to locate and target the force.
The principal modern systems include the Yars family of ICBMs, alongside older missiles that are progressively being retired. Russia has also been developing the RS-28 Sarmat, intended to replace the Soviet-era SS-18.
Sarmat illustrates an important qualification to descriptions of Russia’s modernization program. Moscow announced a successful Sarmat test in May 2026, but the program has experienced years of development and testing difficulties. FAS analysts consequently describe the modernization of Russia’s ICBM force as continuing but subject to delays.
That matters because modernization is not synonymous with an unlimited expansion of nuclear capability. A country can replace an aging missile with a newer one while maintaining broadly similar numbers of launchers and warheads.
Ballistic-missile submarines
Russia’s submarine leg is designed to provide a survivable retaliatory capability.
The Borei-class ballistic-missile submarines carry SLBMs and form the core of the modern sea-based deterrent. Submarines can move through large ocean areas and are therefore considerably harder to target than fixed launch sites.
FAS estimates that approximately 704 strategic warheads are assigned to Russian submarine-launched ballistic missiles.
The strategic importance of this force goes beyond the number of warheads. A credible submarine fleet creates uncertainty for an adversary planning a first strike because the location and availability of deployed submarines cannot be known with certainty.
Strategic bombers
Russia’s third strategic leg consists primarily of Tu-95MS and Tu-160 bombers, with modernization focused on upgraded aircraft and weapons.
Bombers operate differently from ICBMs and SLBMs. They can be dispersed, recalled after launch orders in some circumstances, and used to signal military intentions without immediately launching a nuclear weapon. They can also employ long-range cruise missiles, allowing the aircraft to remain far from the intended target.
FAS estimates approximately 200 strategic warheads at Russian heavy-bomber bases within its deployed-warhead calculation. That methodology differs from New START’s accounting rules, which counted each deployed heavy bomber as one warhead regardless of how many nuclear weapons were physically loaded.
This is a good example of why apparently conflicting nuclear statistics can sometimes describe the same arsenal using different definitions.
Strategic versus non-strategic nuclear weapons
The distinction between strategic and non-strategic, often called tactical, is primarily about military role, range and intended use rather than simply explosive yield.
Strategic weapons are generally associated with long-range systems capable of threatening an opponent’s homeland. Non-strategic weapons encompass a much wider collection of shorter-range or theater systems.
Russia’s non-strategic arsenal is particularly difficult to measure. FAS estimates approximately 1,794 non-strategic warheads, while US government assessments have generally placed Russia’s non-strategic inventory within a broader range of roughly 1,000–2,000. The variation reflects the scarcity of verifiable information rather than evidence that one side possesses a precise count.
These weapons can be associated with aircraft, naval systems, ground-launched missiles and certain defensive systems. The majority of relevant delivery platforms are dual-capable.
That distinction is important when interpreting battlefield reports. A conventional strike by a nuclear-capable missile does not, by itself, demonstrate that Russia has used a nuclear weapon or that the missile was configured for a nuclear mission.
For readers who want the terminology explained in greater depth, the difference between tactical and strategic nuclear weapons provides the conceptual framework needed to interpret these systems.
Newer systems and the limits of public knowledge
Russia’s modernization program extends beyond the traditional triad.
One prominent example is the Oreshnik, an intermediate-range ballistic missile that has been used with conventional warheads and is considered nuclear-capable. Russia has also been developing the Burevestnik, a nuclear-powered, nuclear-armed cruise missile intended to have intercontinental range.
These programs attract considerable attention because they appear to expand the variety of ways Russia could deliver nuclear weapons. But the existence of a new delivery system does not automatically translate into a large increase in the number of nuclear warheads.
The Burevestnik program, in particular, has faced a history of testing problems and delays. FAS’s 2026 assessment says Russia claimed a successful flight test in 2025 after previous failures, while construction of a suspected deployment facility was still incomplete as of March 2026.
This distinction between capability and operational maturity is essential. A weapons program can be technologically significant while still contributing relatively little to the immediately deployable nuclear force.
What changed after New START expired?
One of the most consequential developments for understanding Russia’s arsenal occurred not with a new missile but with the disappearance of a major source of transparency.
The US-Russia New START treaty expired in February 2026. It had limited each side to 700 deployed ICBMs, SLBMs and heavy bombers, 1,550 warheads on those strategic systems, and 800 deployed and non-deployed launchers and bombers under its treaty counting rules. Russia had already suspended its participation in the treaty’s verification mechanisms in 2023.
The consequence is not that Russia automatically exceeded those limits. Rather, the international community has less verified information with which to determine what Russia is doing.
FAS says the end of New START will reduce confidence in open-source estimates because the treaty previously provided data exchanges and other transparency mechanisms. Its 2026 assessment nevertheless says Russia appears to remain below the former treaty limits, while noting that the situation could change.
The loss of verification therefore creates two separate risks: actual changes in force levels become harder to detect, and uncertainty itself becomes a strategic factor.
What does Russia’s nuclear doctrine say?
Russia’s arsenal cannot be understood separately from its declared nuclear policy.
Moscow revised its public Foundations of State Policy on Nuclear Deterrence in 2024. The updated document describes several circumstances in which nuclear weapons could potentially be used, including reliable information about a ballistic-missile attack, nuclear or other weapons-of-mass-destruction use against Russia or its allies, attacks affecting critical infrastructure supporting nuclear retaliation, and certain conventional attacks judged to create a critical threat to Russia’s sovereignty or territorial integrity.
Compared with the 2020 formulation, the language is broader. Analysts therefore describe the 2024 document as potentially lowering the publicly stated threshold for nuclear use, although doctrine does not provide a simple formula that allows observers to predict exactly what Russia would do in a particular crisis.
The Kremlin itself presents the policy as nuclear deterrence rather than a declaration of intended nuclear employment. In 2024, Vladimir Putin said Russia had clarified the basic principles governing nuclear use while emphasizing the deterrence function of the policy.
The distinction matters because declared doctrine, military planning and actual political decision-making are not necessarily identical.
A detailed examination of the policy framework is available in Inside Russia’s nuclear doctrine: from deterrence to escalation.
How much of Russia’s arsenal is actually ready?
This is one of the most misunderstood questions in discussions of nuclear weapons.
A warhead can exist in the national inventory without being mounted on a missile or aircraft. A delivery platform can be nuclear-capable without carrying a nuclear warhead. A missile can be operational while undergoing maintenance, and a submarine can be part of the strategic force while temporarily unavailable.
FAS estimates approximately 1,796 deployed strategic warheads, including those assigned to ICBMs, ballistic-missile submarines and bomber forces. It separately estimates roughly 810 strategic warheads in storage and about 1,794 non-strategic warheads.
Consequently, the frequently cited figure of roughly 5,400 Russian nuclear weapons should not be interpreted as 5,400 weapons sitting on launchers ready to be fired.
The distinction between stockpile size and operational readiness is central to understanding nuclear deterrence. For a deeper look at Russian delivery systems and their geographic reach, see How far can Russia’s nuclear weapons reach?.
Why Russia’s nuclear arsenal matters beyond Russia
Russia and the United States remain the two dominant nuclear powers. SIPRI estimates that the two countries together possess almost 86 percent of the world’s total nuclear inventory, while their combined share of stockpiled warheads available to their militaries is about 83 percent.
That concentration means changes in Russian nuclear policy affect the broader strategic environment, particularly Europe.
NATO continues to describe nuclear weapons as a core component of its deterrence and defence posture. In June 2026, NATO’s Nuclear Planning Group said the Alliance would continue modernizing its nuclear capabilities and strengthening nuclear planning in response to the changing security environment.
This produces a difficult strategic feedback loop. Russia views its nuclear forces as an essential guarantee against major threats to the state. NATO views its own nuclear capability as a means of deterring aggression and coercion. Each side’s efforts to strengthen deterrence can consequently become part of the other’s assessment of the threat.
The result is an environment in which nuclear weapons influence conventional military planning even when no nuclear weapon is actually used.
That dynamic is particularly important in Europe, where a conventional confrontation involving Russia and NATO could develop under the shadow of nuclear deterrence. What a Russia-NATO nuclear crisis could mean for Europe examines that wider strategic problem.
Russia’s arsenal is changing—but not in one simple direction
The public evidence points to modernization, diversification and continued reliance on nuclear deterrence, rather than a straightforward story of Russia simply accumulating ever-larger numbers of nuclear weapons.
Russia is replacing aging Soviet-era systems, developing new delivery technologies and maintaining a substantial non-strategic arsenal. At the same time, some modernization programs have encountered significant delays, and available evidence does not show the dramatic expansion of Russia’s non-strategic warhead inventory that some earlier US projections anticipated. FAS and SIPRI both emphasize modernization while noting the limits of publicly available information.
The end of New START makes the picture harder to follow. Without the treaty’s previous verification and data-exchange mechanisms, analysts increasingly have to rely on indirect evidence. That does not mean the available estimates are useless; it means their uncertainty needs to be taken seriously.
The most important question going forward is therefore not simply how many nuclear weapons Russia has. It is how the combination of modernization, readiness, doctrine, force posture and political signaling changes the conditions under which nuclear deterrence operates. As arms-control constraints weaken and the major nuclear powers modernize their arsenals, the quality of available information becomes strategically important in its own right: greater uncertainty can make crises harder to interpret, while clearer communication and verifiable limits can reduce the possibility that governments mistake preparation for imminent attack—or interpret a warning as something more than a warning.