Interesting fact: The largest submarines can weigh as much as several thousand cars combined.
The answer: A typical military submarine weighs between 2,000 and 18,000 metric tons (about 4.4 to 39.7 million pounds), depending on its class and size.
Submarines vary widely in size and weight depending on their purpose and design. Smaller research or tourist submarines may weigh just a few tons, while large nuclear-powered attack or ballistic missile submarines can weigh tens of thousands of tons. The weight includes the hull, onboard equipment, weapons, and crew supplies. Their heavy weight is necessary to withstand underwater pressure and maintain stability while submerged.
