Navy comparison: 
Australia vs 
United Kingdom
United Kingdom's 154-ship navy outnumbers Australia's 59 vessels (2.6:1 advantage). Of these, 44 and 60 are in active service respectively.
SEAS (Sea Equipment Aggregate Strength) Index face-off Full ranking →
AustraliaWorld #22
26.2
SEAS Index / 100
United Kingdom leads on 5 of 7 categories
United KingdomWorld #12
36.5
Australia
United Kingdom
Bars: weighted contribution to the SEAS Index (hulls × category weight) · figures: active hulls at each side's latest inventory year · Methodology
Key figures as of 2026
| Australia | United Kingdom | Ratio | |
|---|---|---|---|
| Official name | Royal Australian Navy | Royal Navy | |
| Total ships | 59 | 154 | 🇬🇧 2.6× |
| Active ships | 44 | 60 | 🇬🇧 1.4× |
| On order / planned | 12 | 16 | 🇬🇧 1.3× |
| Submarines | 6 | 10 | 🇬🇧 1.7× |
| Principal surface combatants | 10 | 11 | 🇬🇧 1.1× |
| Aircraft carriers | 0 | 2 | 🇬🇧 |
| Amphibious ships | 3 | 0 | 🇦🇺 |
Show full breakdown · 3 more rowsHide the 3 extra rows
| Patrol boats | 20 | 26 | 🇬🇧 1.3× |
| Mine warfare | 2 | 7 | 🇬🇧 3.5× |
| Auxiliaries | 3 | 4 | 🇬🇧 1.3× |
Backbone classes one per tier held
Analyst Assessment
Run the wargame simulation →Verdict
Edge: United Kingdom
The United Kingdom's Royal Navy holds a clear overall edge over Australia's Royal Australian Navy, built on two Queen Elizabeth-class carriers, ten submarines including four Vanguard-class ballistic-missile boats, and a global basing network. Australia fields a compact, capable regional force — three Hobart-class destroyers, seven Anzac-class frigates and six Collins-class submarines — but lacks carrier aviation and comparable strategic reach.
Domain by domain
Carriers & naval aviation
Edge: United Kingdom
🇦🇺 AustraliaNo carriers. Fixed-wing naval strike is absent; the two Canberra-class LHDs provide rotary-wing decks and limited sea-based air support, dependent on land-based RAAF cover for air power at range.
🇬🇧 United KingdomTwo 65,000-tonne Queen Elizabeth-class carriers operating F-35B, the core of a deployable carrier strike group. This single capability accounts for much of the SEAS gap (weight ×200 per hull).
Submarines
Edge: United Kingdom
🇦🇺 AustraliaSix diesel-electric Collins-class boats, long-ranged for conventional submarines and regionally well regarded, but ageing and requiring life-of-type extension pending the AUKUS nuclear transition.
🇬🇧 United KingdomTen boats: six nuclear attack submarines (Astute-class, one more on order) and four Vanguard-class SSBNs carrying the national deterrent, with four Dreadnought-class replacements ordered.
Surface combatants
Edge: United Kingdom
🇦🇺 AustraliaTen principal combatants: three Aegis-equipped Hobart-class destroyers and seven Anzac-class frigates, with three Hunter-class frigates on order. Balanced air-defence and ASW mix for regional escort work.
🇬🇧 United KingdomEleven principal combatants: six Daring-class (Type 45) air-defence destroyers and five Duke-class (Type 23) frigates, a thin ASW force pending six Type 26 and three Type 31 deliveries.
Bases & reach
Edge: United Kingdom
🇦🇺 AustraliaNine home bases (Stirling, Cairns, Coonawarra, Kuttabul and others) concentrated on the Australian continent, giving depth across the Indian and South Pacific approaches but no permanent overseas footholds.
🇬🇧 United KingdomNine bases spanning Clyde, Devonport and Portsmouth plus Gibraltar, Bahrain, Duqm, Singapore and the South Atlantic — a sustained forward-presence architecture supporting out-of-area deployment.
Shipbuilding & sustainment
Edge: United Kingdom
🇦🇺 AustraliaTwelve hulls planned — six Cape and three Arafura patrol boats, three Hunter frigates — alongside two Supply-class replenishment ships; a rebuilding domestic yard base with a long AUKUS-driven ramp-up.
🇬🇧 United KingdomSixteen hulls planned across Type 26, Type 31, Dreadnought and Astute programmes, plus two Thales USVs; a deeper but capacity-constrained industrial base carrying nuclear and surface work simultaneously.
Wildcards
- AUKUS submarine transition Australia's planned shift to nuclear-powered attack submarines would narrow the undersea gap decisively, but delivery lies well beyond the 2026 inventory and depends on US and UK industrial capacity.
- Geographic theatre fit Australia's fleet is optimised for a single vast maritime approach, where its 20 patrol boats and long-endurance Collins boats matter. The Royal Navy is structured for global deployment, spreading a similar hull count thinner.
- Escort mass for carriers Two carriers require sustained escort and replenishment. With eleven principal combatants and three support ships, the Royal Navy can generally form one strike group at a time, limiting concurrent commitments.
- Mine warfare divergence The United Kingdom fields seven mine-warfare vessels against Australia's two Huon-class, and is moving toward uncrewed systems with two Thales USVs ordered — a niche where the gap is proportionally largest.
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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
Which country has more naval ships, Australia or United Kingdom?
United Kingdom has a larger navy with 154 ships compared to Australia's 59 ships.
Which navy has more submarines, Australia or United Kingdom?
United Kingdom operates more submarines with 15 compared to Australia's 6.
Which country has more aircraft carriers, Australia or United Kingdom?
United Kingdom has 2 aircraft carrier(s) compared to Australia's 0.
Which navy has more destroyers, Australia or United Kingdom?
United Kingdom operates 6 destroyers compared to Australia's 3.
Which navy has more frigates, Australia or United Kingdom?
United Kingdom operates 18 frigates compared to Australia's 10.
How do the Australia and United Kingdom navies compare in size?
United Kingdom's navy is 2.6 times larger than Australia's in terms of total ships (154 vs 59).