Military Strength: 
Iran vs 
United States
United States (ranked #1 globally) holds a stronger overall military position than Iran (#30) on the ARMS Index. United States fields 1,395,000 active troops — 2.1:1 Iran's 650,000, backed by 806,700 reserves. United States's $920B defense budget is 97:1 that of Iran ($9.5B).
ARMS (Aggregate Rating of Military Strength) Index face-off Full ranking →
IranWorld #30
47.2
ARMS Index / 100
United States leads on 6 of 6 pillars
United StatesWorld #1
100.0
Iran
United States
Pillar scores 0–100 (weight under each label) over a headline figure from that domain · readiness modifier ×0.94 vs ×1.20 · Methodology
Key figures
| Iran | United States | Ratio | |
|---|---|---|---|
| Defense budget | $9.5B | $920B | 🇺🇸 97× |
| – share of GDP | 2.0% | 3.2% | 🇺🇸 1.6× |
| Active personnel | 650,000 | 1,395,000 | 🇺🇸 2.1× |
| Combat aircraft | 295 | 2,948 | 🇺🇸 10.0× |
| Warships | 112 | 232 | 🇺🇸 2.1× |
| – submarines | 2 | 64 | 🇺🇸 32× |
| Main battle tanks | 1,713 | 4,640 | 🇺🇸 2.7× |
| Nuclear warheads | 0 | 5,042 | 🇺🇸 |
Show full breakdown · 14 more rowsHide the 14 extra rows
| Reserve troops | 350,000 | 806,700 | 🇺🇸 2.3× |
| Paramilitary forces | 40,000 | 0 | 🇮🇷 |
| Military aircraft (all types) | 636 | 12,784 | 🇺🇸 20× |
| – helicopters | 160 | 5,442 | 🇺🇸 34× |
| – bombers | 0 | 147 | 🇺🇸 |
| Aircraft carriers | 0 | 18 | 🇺🇸 |
| Deployed warheads | 0 | 1,770 | 🇺🇸 |
| Budget share of govt spending | — | — | — |
| Budget per capita | $104 | $2,705 | 🇺🇸 26× |
| Population | 91.6M | 340.1M | 🇺🇸 3.7× |
| GDP | $475B | $28.8T | 🇺🇸 60× |
| GDP per capita | $5,190 | $84,534 | 🇺🇸 16× |
| Land area | 1,531,595 km² | 9,147,593 km² | 🇺🇸 6.0× |
| Coastline | 2,440 km | 19,924 km | 🇺🇸 8.2× |
Backbone systems most numerous in service
Defense budget history Iran ×1.1 · United States ×1.1 since 2021
Military personnel history
Analyst Assessment
Run the wargame simulation →Verdict
Edge: United States
The United States holds an overwhelming and comprehensive advantage over Iran, with a defense budget roughly a hundred times larger, a global expeditionary navy and air force, and a nuclear triad against Iran's zero warheads. Iran's counterweight is not conventional parity but depth, dispersion and asymmetric tools — ballistic and cruise missiles, drones, naval swarm tactics in the Strait of Hormuz and regional partner militias — which raise the cost of any prolonged campaign without reversing the balance.
Domain by domain
Air power
Edge: United States
🇮🇷 Iran295 combat aircraft, largely pre-1979 F-4 Phantom II, F-14 and F-5 airframes plus MiG-29s, with limited Su-35 and Yak-130 additions; no bombers, no stealth, constrained spares and tanker support.
Naval power
Edge: United States
🇮🇷 Iran112 hulls but almost all light: fast attack craft, corvettes, midget submarines and two Kilo-class boats. Doctrine favours mine warfare, anti-ship missiles and swarming in the confined Gulf, not blue-water operations.
🇺🇸 United States232 warships including 18 carriers (10 Nimitz-class), 64 submarines and Arleigh Burke destroyers, sustaining carrier strike groups worldwide with organic air wings and Tomahawk land-attack capacity.
Missiles & air defence
Edge: United States
🇮🇷 IranThe most substantial ballistic and cruise missile inventory in the region, plus mass-produced one-way attack drones; layered defences combine indigenous Bavar-373 with Russian S-300. Doctrine treats missile salvos as the primary strike arm.
🇺🇸 United StatesLong-range precision strike from bombers, submarines and carriers; layered defence via Aegis BMD, THAAD and Patriot deployed regionally, though magazine depth against saturation salvos is a recognised constraint.
Nuclear deterrent
Edge: United States
🇮🇷 IranNo warheads. Status assessed as acquiring, with an enrichment programme that confers latency rather than a deliverable deterrent; strategic signalling rests instead on conventional missiles.
🇺🇸 United States5,042 warheads, 1,770 deployed across a full triad of ICBMs, ballistic missile submarines and heavy bombers, with extended deterrence commitments to allies.
Defense industry & budget
Edge: United States
🇮🇷 Iran$9.5B, 2.0% of a $475B GDP, under sustained sanctions. Domestic industry delivers cheap volume — drones, missiles, Safir 74 and Zulfiqar tanks — but cannot produce modern aero-engines, avionics or major warships.
🇺🇸 United States$920B, 3.2% of a $28.8T GDP, roughly a hundredfold Iran's spending, with a full-spectrum industrial base building carriers, submarines, stealth aircraft and munitions, though precision-munition surge rates are a known bottleneck.
Wildcards
- Strait of Hormuz chokepoint Iran's 2,440 km coastline overlooks a narrow waterway carrying a large share of seaborne oil. Mines, anti-ship missiles and small-craft swarms could disrupt traffic and impose global economic costs disproportionate to Iran's military weight.
- Regional partner networks Tehran's forward-defense doctrine relies on aligned non-state actors in Lebanon, Iraq, Syria and Yemen. Their capacity has been degraded in recent years, but they still provide deniable reach against US bases and shipping.
- Geography and mass 1.53 million km² of mountainous terrain, 91 million people and 650,000 active troops make occupation impractical. US options realistically stop at air and missile campaigns, which historically do not compel regime change.
- Alliance and basing access US power projection depends on Gulf host nations permitting strike operations from their territory. Political constraints on basing, overflight and escalation can materially narrow the tempo and scope of a campaign.
Outlook
| Scenario | Short war | Protracted war |
|---|---|---|
| Conventional | 🇺🇸 US air and naval dominance is immediate. | 🇺🇸 Iranian forces degrade; no ground occupation feasible. |
| Hybrid/Asymmetric | 🇺🇸 Missile and drone salvos absorbed, costs rise. | Even Attrition, proxies and shipping risk favour Tehran. |
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Strait of Hormuz Tensions
Live tracker
109 commercial ship transits of the Strait of Hormuz were recorded in the 30 days through August 16, 2026. Daily activity data, incident log and force balance, updated from official reports.
Editorial assessment produced from the figures on this page and public sources; it is an informed reading, not a military assessment or a prediction.
Frequently Asked Questions
Who has more military personnel, Iran or United States?
United States has approximately 1,395,000 active military personnel compared to Iran's 650,000, giving United States a 2.1:1 numerical advantage.
Which country has more combat aircraft, Iran or United States?
United States operates 2,948 combat aircraft compared to Iran's 295. This includes fighters, strike aircraft, and multirole combat jets.
Who has the larger navy, Iran or United States?
United States has a larger navy with 232 vessels compared to Iran's 112 ships. Iran operates 2 submarines while United States has 64.
Which country spends more on defense, Iran or United States?
United States has a larger defense budget at $920 billion (97:1 more) compared to Iran's $9.5 billion annually.
Do Iran and United States have nuclear weapons?
United States possesses nuclear weapons with approximately 5,042 warheads, while Iran does not have nuclear weapons.
How do the tank forces of Iran and United States compare?
United States operates 4,640 main battle tanks compared to Iran's 1,713. Tank numbers reflect both active inventory and reserves.