Largest Cruise Ships Volume Comparison (GT)
Compare the 10 largest cruise ships by gross tonnage, from Icon of the Seas at 248,663 GT to Iona at 184,089. Enclosed volumes with shipyard sources listed.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Icon of the Seas Largest cruise ship in the world. | 248,663 gross tonnage | Royal Caribbean, Meyer Turku 2024 | Royal Caribbean Icon spec: 248,663 GT |
| Utopia of the Seas Second Oasis class plus. | 236,860 gross tonnage | Royal Caribbean, Chantiers 2024 | Royal Caribbean Utopia spec: 236,860 GT |
| Wonder of the Seas 3 under Utopia. | 236,857 gross tonnage | Royal Caribbean, Chantiers 2022 | Royal Caribbean Wonder spec: 236,857 GT |
| Symphony of the Seas Held lead 2018 to 2022. | 228,081 gross tonnage | Royal Caribbean, Chantiers 2018 | Royal Caribbean Symphony spec: 228,081 GT |
| Harmony of the Seas Held lead 2016 to 2018. | 226,963 gross tonnage | Royal Caribbean, Chantiers 2016 | Royal Caribbean Harmony spec: 226,963 GT |
| Oasis of the Seas Refits add tons; launch figure ranked. | 225,282 gross tonnage | Royal Caribbean, Turku 2009 | Royal Caribbean Oasis spec: 225,282 GT launch |
| Allure of the Seas Tied sister with Oasis. | 225,282 gross tonnage | Royal Caribbean, Turku 2010 | Royal Caribbean Allure spec: 225,282 GT launch |
| MSC World Europa Largest non Royal Caribbean here. | 215,863 gross tonnage | MSC Cruises, Chantiers 2022 | MSC World Europa spec: 215,863 GT |
| Costa Smeralda LNG powered. | 185,010 gross tonnage | Costa Cruises, Meyer Turku 2019 | Costa Smeralda spec: 185,010 GT |
| Iona 921 under Smeralda. | 184,089 gross tonnage | P and O Cruises, Meyer 2020 | P and O Iona spec: 184,089 GT |
About this converter
Icon of the Seas measures 248,663 gross tonnage, about 11,800 clear of Utopia at 236,860. Wonder at 236,857 sits 3 under Utopia. Symphony at 228,081, Harmony at 226,963, Oasis and Allure at 225,282 each follow. World Europa at 215,863 leads outside Royal Caribbean. Smeralda at 185,010 and Iona at 184,089 close the table. Gross tonnage counts enclosed volume, not weight. Refits add tons, so launch figures rank here with that noted.
How to use it
Pick two ships and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try Icon against Oasis to see the 23,000 gap. The bars below scale to Icon so Iona looks short. Switch the unit to thousands for short figures. Ratios are exact divisions of the gross tonnages.
Length vs volume splits this site. Cruise-ship-lengths ranks hull meters. This page ranks enclosed GT volume. Oasis and Allure tie at launch 225,282, though refits lift both slightly by year. World Europa 215,863 is the largest outside Royal Caribbean. Figures follow owner and yard specs at delivery.
FAQ
What is the largest cruise ship?
Icon of the Seas at 248,663 GT. It entered service in 2024.
Is gross tonnage weight?
No. It counts enclosed volume. Higher GT means more inside space, not heavier steel.
Why do Oasis and Allure tie?
Sister ships at launch 225,282 GT. Refits add small tons after.
What is the largest non Royal ship?
MSC World Europa at 215,863 GT here.
Sources
- Royal Caribbean specs at delivery: Icon 248,663; Utopia 236,860; Wonder 236,857; Symphony 228,081; Harmony 226,963; Oasis 225,282; Allure 225,282 GT
- Yard specs: MSC World Europa 215,863; Costa Smeralda 185,010; P and O Iona 184,089 GT
Last verified: 2026-10-09 · 10 entries
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