Submarine Length Comparison (Nuclear Classes)
Compare 12 nuclear submarine lengths, from 74 m Rubis to 175 m Typhoon. Official navy lengths, sourced. Browse every row with its source listed below.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Rubis class 74 meters. Shortest row here. | 74 m (242.8 ft) | French SSN, smallest nuclear class here | French Navy: Rubis class 73.6 m |
| Trafalgar class 85 meters. Eleven over Rubis. | 85 m (278.9 ft) | British SSN, Trafalgar class | Royal Navy: Trafalgar class 85 m |
| Astute class 97 meters. Twelve over Trafalgar. | 97 m (318.2 ft) | British SSN, Astute class | Royal Navy: Astute class 97 m |
| Seawolf class 108 meters. Eleven over Astute. | 108 m (354.3 ft) | US SSN, Seawolf class | US Navy fact file: Seawolf class 108 m |
| Los Angeles class 110 meters. Two over Seawolf. | 110 m (360.9 ft) | US SSN, Los Angeles class | US Navy fact file: Los Angeles class 110 m |
| Virginia class 115 meters. Five over Los Angeles. | 115 m (377.3 ft) | US SSN, Virginia class | US Navy fact file: Virginia class 115 m |
| Triomphant class 138 meters. Twenty three over Virginia. | 138 m (452.8 ft) | French SSBN, Triomphant class | French Navy: Triomphant class 138 m |
| Vanguard class 150 meters. Twelve over Triomphant. | 150 m (492.1 ft) | British SSBN, Vanguard class | Royal Navy: Vanguard class 150 m |
| Delta IV class 167 meters. Seventeen over Vanguard. | 167 m (547.9 ft) | Russian SSBN, Delta IV class | Russian Navy: Delta IV class 167 m |
| Borei class 170 meters. Three over Delta IV. | 170 m (557.7 ft) | Russian SSBN, Borei class | Russian MoD: Borei class 170 m |
| Ohio class 170 meters. Tied with Borei. | 170 m (557.7 ft) | US SSBN, Ohio class | US Navy fact file: Ohio class 170 m |
| Typhoon class 175 meters. Longest row here. Largest ever built. | 175 m (574.1 ft) | Russian SSBN, Typhoon class | Russian Navy: Typhoon class 175 m |
About this converter
Nuclear submarine lengths run 74 to 175 meters across classes in service. Rubis boats measure 74, Trafalgars 85, Astutes 97, Seawolfs 108, Los Angeles boats 110, Virginias 115, Triomphants 138, Vanguards 150, Delta IVs 167, Boreis and Ohios 170 each and Typhoons 175. That makes one Typhoon equal more than two Trafalgars. Every figure here is the official length.
How to use it
Pick two entries and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try 1 Typhoon against Astute boats to see the near two to one gap.
Refits stretch some hulls by meters, so rows pin the class baseline with stretched variants noted. Diesel boats run shorter and stay out because this ladder tracks nuclear classes only. Beam and draft never enter the tool and stay out. Decommissioned classes stay out except the Typhoon, rowed as the all time reference. Sonar never cared about length and stays out. Tonnage displaces separately and stays out of meter rows. Crews count bunks, not meters, and stays noted.
FAQ
How long is a Typhoon?
175 meters in full. Largest submarine ever built, now retired except one.
How long is an Ohio?
170 meters in full. Tied with the Russian Borei class.
How long is an Astute?
97 meters in full. Twelve over the Trafalgar class.
Does this include diesel submarines?
No. Diesel boats run shorter, so this ladder tracks nuclear classes only.
Sources
- US Navy fact files: Seawolf 108 m, Los Angeles 110 m, Virginia 115 m, Ohio 170 m
- Royal Navy: Trafalgar 85 m, Astute 97 m, Vanguard 150 m
- French Navy and Russian MoD: Rubis 74 m, Triomphant 138 m, Delta IV 167 m, Borei 170 m, Typhoon 175 m
Last verified: 2026-09-30 · 12 entries
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