How heavy is a submarine?

The weight of a submarine varies significantly based on its type and purpose. A small research submarine might weigh around 100 tons, while larger military submarines, such as nuclear-powered ones, can weigh over 10,000 tons when submerged. The heaviest submarines, like the Russian Typhoon class, can exceed 24,000 tons. Overall, submarines are designed to be heavy enough to submerge and navigate underwater effectively.