How big a rocket fuel tank is?

The size of a rocket fuel tank varies widely depending on the type of rocket and its mission. For example, the Space Shuttle's external fuel tank held about 500,000 liters (around 132,000 gallons) of propellant, while smaller rockets like the Falcon 9 have tanks that can hold around 150,000 liters (about 40,000 gallons) of fuel. The dimensions are tailored to accommodate the specific thrust and payload requirements of the rocket. Ultimately, the tank size is a critical factor in determining the rocket's performance and capabilities.