When fully loaded with a crew and payload, the Crew Dragon weighs about . But compared to the Falcon 9, the Crew Dragon is tiny—less than of the rocket's total mass.
But the Crew Dragon is a fully-equipped spacecraft in its own right, complete with maneuvering thrusters for navigating in low-Earth orbit. It even has an autonomous flight system, because flying a rocket is never as easy as it looks in the movies.